Stationary source emissions - Mercury monitoring using sorbent traps

The purpose of this document is to establish performance benchmarks for, and to evaluate the acceptability of, sorbent trap monitoring systems used to monitor total vapour- phase mercury (Hg) emissions in stationary source flue gas streams. These monitoring systems involve continuous repetitive in-flue sampling using paired sorbent traps with subsequent analysis of the time-integrated samples.
This document is suitable for both short-term (periodic) measurements and long-term (continuous) monitoring using sorbent traps.
NOTE   When this Technical Specification has been validated, the sorbent trap method will be an Alternative Method subject to the restrictions on applicability defined below. Until that time, EN 13211 is the only accepted Reference Method for both short-term (periodic) measurements and for calibrating continuous monitoring systems, including those with long-term sampling systems. EN 13211 is a wet chemistry approach that relies on absorption of mercury into impinger solutions.
The substance measured according to this specification is the total vapour phase mercury in the flue gas, which represents the sum of the elemental mercury (Hg0) and gaseous forms of oxidized mercury (Hg2+), such as mercury (II) chloride, in mass concentration units of micrograms (μg) per dry meter cubed (m3). The analytical range is typically 0,1 to greater than 50 µg/m3.
The sorbent tube approach is intended for use under relatively low particulate conditions (typically less than 100 mg/m3) when monitoring downstream of all pollution control devices, e.g. at coal fired power plants and cement plants. In this case, the contribution of mercury in the particulate fraction is considered to be negligible (typically less than 5 % of total mercury). However, it shall be noted that the sorbent trap does take account of the finest particle fraction that is sampled with the flue gas, in addition to capturing the vapour phase mercury.
This specification also contains routine procedures and specifications that are designed to evaluate the ongoing performance of an installed sorbent trap monitoring system. The operator of the industrial installation is responsible for the correct calibration, maintenance and operation of this long-term sampling system. Additional requirements for calibration and quality assurance of the long-term sampling system are then defined in EN 14884 and EN 14181.

Emissionen aus stationären Quellen - Quecksilbermonitoring mit Sorptionsfallen

Dieses Dokument dient dazu, Leistungskenngrößen für die Beurteilung der Eignung von Messsystemen mit Sorptionsfallen (Sorbent Traps) zur Überwachung der gesamten gasförmigen Quecksilber (Hg)-Emissionen in Abgasströmen aus ortsfesten Quellen festzulegen. Diese Überwachungssysteme nutzen sich wiederholende, kontinuierliche Probenahmen aus dem Abgasstrom mit Anreicherung auf paarweise angeordneten Sorptionsfallen und anschließender Analyse der zeitintegrierten Proben.
Dieses Dokument eignet sich gleichermaßen für Kurzzeitmessungen (periodisch) und für Langzeitmessungen (kontinuierlich) unter Verwendung von Sorptionsfallen.
ANMERKUNG   Nach der Validierung dieser Technischen Spezifikation wird das Sorptionsfallenverfahren ein alternatives Verfahren sein, das den nachfolgend festgelegten Anwendungsbeschränkungen unterliegt. Bis dahin ist EN 13211 das einzige akzeptierte Referenzverfahren für periodische Kurzzeitmessungen und für Vergleichsmessungen bei der Kalibrierung von kontinuierlich arbeitenden Messeinrichtungen einschließlich Systemen mit Langzeit-Probenahmeeinrichtungen. EN 13211 ist ein nasschemisches Verfahren auf der Grundlage der Absorption von Quecksilber in Absorptionslösungen.
Die nach dieser Spezifikation gemessene Substanz ist das gesamte gasförmige Quecksilber in dem Abgas und repräsentiert die Summe aus elementarem Quecksilbers (Hg0) und gasförmigem oxidierten Quecksilber (Hg2+), wie etwa Quecksilber-(II)-Chlorid, in Massenkonzentrationseinheiten von Mikrogramm (μg) je Kubikmeter/trocken (m3). Der Anwendungsbereich der Methode liegt üblicherweise zwischen 0,1 µg/m3 und 50 µg/m3 und darüber hinaus.
Das Messverfahren ist für Anwendungen mit relativ geringen Partikelkonzentrationen (üblicherweise weniger als 100 mg/m3) bei Messungen hinter allen Abgasreinigungseinrichtungen beispielsweise in Kohlekraftwerken oder Zementwerken vorgesehen. Unter diesen Bedingungen gilt der Anteil an partikelgebundenem Quecksilber als vernachlässigbar (üblicherweise weniger als 5 % des Gesamtquecksilbers). Es ist zu beachten, dass neben den gasförmigen Quecksilberverbindungen auch die feinste Staubfraktion, die bei der Probenahme mit dem Messgut aus dem Abgas entnommen wird, berücksichtigt wird.
Diese Spezifikation enthält darüber hinaus Routineverfahren und Anforderungen für die fortlaufende Beurteilung der Funktionsfähigkeit einer installierten Sorptionsfallen-Probenahmeeinrichtung. Der Betreiber der Industrieanlage ist für die korrekte Kalibrierung, Instandhaltung und den korrekten Betrieb dieser Langzeit-Probenahmeeinrichtung zuständig. Zusätzliche Anforderungen an die Kalibrierung und Qualitätssicherung der Langzeit-Probenahmeeinrichtung sind in EN 14884 und EN 14181 festgelegt.

Émissions de sources fixes - Surveillance du mercure à l'aide de pièges adsorbants

L’objectif du présent document est d’établir des références de performance et d’évaluer l’acceptabilité des systèmes de surveillance à piège adsorbant employés pour surveiller les émissions de mercure (Hg) dans la phase vapeur totale dans les courants d’effluents gazeux de sources fixes. Ces systèmes de surveillance impliquent des échantillonnages répétitifs continus dans le conduit à l’aide de pièges adsorbants appariés, suivis d’une analyse des échantillons intégrés dans le temps.
Le présent document est adapté à la fois aux mesurages à court terme (périodiques) et à la surveillance à long terme (continue) à l’aide de pièges adsorbants.
NOTE   Lors de la validation de la présente Spécification technique, la méthode du piège adsorbant constituera une Méthode alternative soumise aux restrictions d’applicabilité définies ci-dessous. Jusqu’à l’heure actuelle, l’EN 13211 est la seule Méthode de référence acceptée à la fois pour les mesurages à court terme (périodiques) et pour l’étalonnage des systèmes de surveillance continue, y compris ceux avec systèmes d’échantillonnage en continu. L’EN 13211 est une approche chimique par voie humide qui repose sur l’absorption du mercure dans des solutions pour impingers.
La substance mesurée conformément à la présente spécification est le mercure total de la phase vapeur dans les effluents gazeux ; il représente la somme du mercure élément (Hg0) et des formes gazeuses de mercure oxydé (Hg2+), comme le chlorure de mercure (II), exprimée en concentration massique sous la forme de microgrammes (μg) par mètre cube sec (m3). La plage analytique est typiquement comprise entre 0,1 µg/m3 et plus de 50 µg/m3.
L’approche par tube adsorbant est destinée à être utilisée dans des conditions de relativement faible teneur en particules (typiquement moins de 100 mg/m3) lors de la surveillance en aval de tous les dispositifs de contrôle de la pollution, par exemple dans les centrales à charbon et les cimenteries. Dans ce cas, la contribution du mercure à la fraction particulaire est considérée comme négligeable (typiquement moins de 5 % du mercure total). Toutefois, il doit être noté que le piège adsorbant tient compte de la fraction particulaire la plus fine qui est échantillonnée avec l’effluent gazeux, en plus de capturer le mercure de la phase vapeur.
La présente spécification contient également des modes opératoires de routine et des spécifications conçus pour évaluer les performances continues d’un système de surveillance à piège adsorbant installé. L’opérateur de l’installation industrielle est responsable de l’étalonnage, de la maintenance et de l’exploitation corrects de ce système d’échantillonnage en continu. Des exigences supplémentaires concernant l’étalonnage et l’assurance qualité du système d’échantillonnage en continu sont définies dans l’EN 14884 et dans l’EN 14181.

Emisije nepremičnih virov - Monitoring živega srebra z adsorpcijsko cevko

Namen te tehnične specifikacije je vzpostaviti merila uspešnosti in oceniti sprejemljivost nadzornih sistemov adsorpcijskih cevk, ki se uporabljajo za monitoring skupnih emisij živega srebra (Hg) v parni fazi pri tokih odpadnih plinov iz nepremičnih virov. Ti nadzorni sistemi vključujejo neprekinjeno ponavljajoče se dimno vzorčenje z uporabo parov adsorpcijskih cevk z naknadno analizo časovno integriranih vzorcev.
Ta tehnična specifikacija je primerna za kratkotrajne (občasne) meritve in za dolgoročen (neprekinjen) monitoring z uporabo adsorpcijskih cevk.
Snov, ki je merjena skladno s to specifikacijo, je skupna emisija živega srebra v odpadnem plinu, ki predstavlja vsoto elementarnega živega srebra in plinastih oblik oksidiranega živega srebra, kot je živosrebrov (II) klorid, ter kubične enote masne koncentracije mikrogramov na suh meter. Obseg analize je običajno od 0,1 do več kot 50 µg/m3.
Pristop cevi s sorbentom je predviden za uporabo pri razmeroma nizkem stanju delcev (običajno manj kot 100 mg/m3) pri monitoringu vseh naprav za uravnavanje onesnaževanja v smeri toka, npr. v elektrarnah na premog in cementarnah. V tem primeru se prispevek živega srebra v frakciji trdnih delcev šteje kot zanemarljiv (običajno manj kot 5 % vsega živega srebra). Opozoriti pa je treba, da je pri adsorpcijski cevki poleg zajetja emisij živega srebra upoštevana tudi najmanjša frakcija delcev, vzorčena z odpadnim plinom.
Ta specifikacija vsebuje tudi rutinske postopke in specifikacije, ki so zasnovani za redno vrednotenje učinkovitosti nameščenega nadzornega sistema adsorpcijskih cevk. Upravljavec industrijske inštalacije je odgovoren za pravilno umerjanje, vzdrževanje in delovanje tega sistema dolgoročnega vzorčenja. Dodatne zahteve za umerjanje in zagotavljanje kakovosti sistema dolgoročnega vzorčenja so nato opredeljene v standardih EN 14884 in EN 14181.

General Information

Status
Published
Publication Date
12-Mar-2019
Current Stage
9020 - Submission to 2 Year Review Enquiry - Review Enquiry
Due Date
15-Apr-2022
Completion Date
15-Apr-2022

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SLOVENSKI STANDARD
SIST-TS CEN/TS 17286:2019
01-september-2019
Emisije nepremičnih virov - Monitoring živega srebra z adsorpcijsko cevko
Stationary source emissions - Mercury monitoring using sorbent traps
Emissionen aus stationären Quellen - Quecksilbermonitoring mit Sorptionsfallen

Émissions de sources fixes - Surveillance du mercure à l'aide de pièges adsorbants

Ta slovenski standard je istoveten z: CEN/TS 17286:2019
ICS:
13.040.40 Emisije nepremičnih virov Stationary source emissions
SIST-TS CEN/TS 17286:2019 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST-TS CEN/TS 17286:2019
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SIST-TS CEN/TS 17286:2019
CEN/TS 17286
TECHNICAL SPECIFICATION
SPÉCIFICATION TECHNIQUE
March 2019
TECHNISCHE SPEZIFIKATION
ICS 13.040.40
English Version
Stationary source emissions - Mercury monitoring using
sorbent traps

Émissions de sources fixes - Surveillance du mercure à Emissionen aus stationären Quellen -

l'aide de pièges adsorbants Quecksilbermonitoring mit Sorptionsfallen

This Technical Specification (CEN/TS) was approved by CEN on 9 December 2018 for provisional application.

This Technical Specification (CEN/TS) was corrected and reissued by the CEN-CENELEC Management Centre on 27 March 2019.

The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to

submit their comments, particularly on the question whether the CEN/TS can be converted into a European Standard.

CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS

available promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in

parallel to the CEN/TS) until the final decision about the possible conversion of the CEN/TS into an EN is reached.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATIO N
EUROPÄISCHES KOMITEE FÜR NORMUN G
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TS 17286:2019 E

worldwide for CEN national Members.
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Contents Page

European foreword ....................................................................................................................................................... 6

1 Scope .................................................................................................................................................................... 7

2 Normative references .................................................................................................................................... 7

3 Terms and definitions ................................................................................................................................... 8

4 Symbols and abbreviations ......................................................................................................................... 9

5 Principle .......................................................................................................................................................... 11

6 Measuring equipment ................................................................................................................................ 11

6.1 Sorbent trap monitoring system equipment specifications ......................................................... 11

6.1.1 Monitoring system ....................................................................................................................................... 11

6.1.2 Moisture removal device ........................................................................................................................... 13

6.1.3 Vacuum pump ................................................................................................................................................ 13

6.1.4 Total sample volume measurement ...................................................................................................... 13

6.1.5 Sample flow rate meter and controller ................................................................................................ 13

6.1.6 Temperature sensor ................................................................................................................................... 13

6.1.7 Absolute pressure sensor .......................................................................................................................... 14

6.1.8 Automatic controller ................................................................................................................................... 14

6.1.9 Sample preparation ..................................................................................................................................... 14

6.1.10 Sample analysis equipment ...................................................................................................................... 14

6.1.11 Sorbent trap spiking system .................................................................................................................... 14

7 Reagents and standards ............................................................................................................................. 15

8 Performance specification test procedure ......................................................................................... 15

8.1 Selection of monitoring site and initial sampling conditions ...................................................... 15

8.2 Pre-sampling spiking of sorbent traps ................................................................................................. 15

8.3 Field blanks .................................................................................................................................................... 15

8.4 Pre-monitoring leak check ....................................................................................................................... 16

8.5 Determination of flue gas characteristics ........................................................................................... 16

8.6 Monitoring ...................................................................................................................................................... 16

8.6.1 System preparation and initial data recording ................................................................................. 16

8.6.2 Flow rate control .......................................................................................................................................... 16

8.6.3 Flue gas moisture determination ........................................................................................................... 17

8.6.4 Essential operating data ............................................................................................................................ 17

8.6.5 Post-monitoring leak check...................................................................................................................... 17

8.6.6 Sample recovery ........................................................................................................................................... 18

8.6.7 Sample handling, storage, and transport ............................................................................................ 18

8.6.8 Sample custody ............................................................................................................................................. 18

9 Quality assurance/quality control (QA/QC) ....................................................................................... 18

10 Calibration and standardization............................................................................................................. 21

10.1 Gaseous and liquid standards .................................................................................................................. 21

10.2 Gas flow meter calibration ........................................................................................................................ 21

10.2.1 General ............................................................................................................................................................. 21

10.2.2 Initial calibration ......................................................................................................................................... 21

10.2.3 Initial calibration procedures ................................................................................................................. 21

10.2.4 Initial calibration factor ............................................................................................................................ 22

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10.2.5 Optional on-site calibration audit for mass flow meters ............................................................... 22

10.2.6 Ongoing quality control .............................................................................................................................. 22

11 Analytical performance criteria .............................................................................................................. 22

11.1 General ............................................................................................................................................................. 22

11.2 Analytical matrix interference test ........................................................................................................ 23

11.2.1 General ............................................................................................................................................................. 23

11.2.2 Analytical matrix interference test procedures ................................................................................ 23

11.2.3 Analytical matrix interference test acceptance criteria ................................................................. 23

11.3 Determination of minimum sample mass ........................................................................................... 24

11.3.1 General ............................................................................................................................................................. 24

11.3.2 Determination of minimum calibration concentration or mass ................................................. 24

11.3.3 Determination of minimum sample mass ........................................................................................... 24

11.3.4 Example determination of minimum sample mass for thermal desorption analysis ......... 24

11.3.5 Example determination of Minimum Sample Mass for Acid Leachate/Digest Analysis ..... 24

11.4 Hg and HgCl analytical bias test (ABT) .............................................................................................. 25

11.4.1 General ............................................................................................................................................................. 25

11.4.2 Hg and HgCl ABT procedures ................................................................................................................ 25

11.4.3 Hg ABT ............................................................................................................................................................. 25

11.4.4 HgCl ABT ......................................................................................................................................................... 25

11.5 Field recovery test ........................................................................................................................................ 25

11.6 Accuracy test using certified reference material .............................................................................. 26

11.6.1 General ............................................................................................................................................................. 26

11.6.2 Gaseous Hg sorbent trap spiking system ............................................................................................ 26

12 Calculations, data reduction, data analysis and reporting ............................................................ 26

12.1 Calculation of pre-sampling spiking level ........................................................................................... 26

12.2 Calculations of the flow reference ratio for flow-proportional sampling ................................ 27

12.3 Calculation of spike recovery ................................................................................................................... 27

12.4 Calculation of breakthrough ..................................................................................................................... 28

12.5 Calculation of mercury concentration .................................................................................................. 28

12.6 Calculation of paired trap agreement ................................................................................................... 29

12.7 Calculation of FRT parameters ................................................................................................................ 29

12.8 Data reduction and method uncertainty .............................................................................................. 30

Annex A (informative) Gaseous Hg0 sorbent trap spiking system .......................................................... 31

Annex B (informative) Calculation of flue gas moisture content ............................................................. 35

B.1 Plants with wet abatement systems....................................................................................................... 35

B.2 Plants without wet abatement systems ................................................................................................ 35

B.2.1 General ............................................................................................................................................................. 35

B.2.2 Calculating moisture content from a stoichiometric fuel factor.................................................. 35

B.2.3 Calculating moisture content from flue gas properties .................................................................. 36

Annex C (normative) Performance criteria and test procedures for certification of long-

term sampling systems ............................................................................................................................... 38

C.1 General requirements ................................................................................................................................. 38

C.2 Validation of the installation/functioning on each plant ............................................................... 39

C.2.1 Preparation ..................................................................................................................................................... 39

C.2.1.1 General ............................................................................................................................................................. 39

C.2.1.2 Minimum requirements for set-up ......................................................................................................... 39

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C.2.1.3 Minimum requirements for selecting the sampling point ............................................................ 39

C.3 Performance criteria and test procedure for certification ........................................................... 39

C.3.1 General relation to other standards ...................................................................................................... 39

C.3.2 General requirements ................................................................................................................................ 39

C.3.2.1 Application of the minimum requirements ........................................................................................ 39

C.3.2.2 Certification ranges ..................................................................................................................................... 39

C.3.3 Performance criteria common to all long-term sampling systems for laboratory

testing ............................................................................................................................................................... 40

C.3.3.1 Performance criteria for the automatic volume proportional flow control ........................... 40

C.3.3.2 Requirements of EN 15267-3 ................................................................................................................... 40

C.3.4 Performance criteria common to all long-term sampling systems for field testing ............ 40

C.3.4.1 For the automatic volume proportional flow control ..................................................................... 40

C.3.4.2 Status information ....................................................................................................................................... 40

C.3.4.3 Availability ..................................................................................................................................................... 40

C.3.4.4 Reproducibility ............................................................................................................................................. 41

C.3.4.5 Automatic post-adjustment unit ............................................................................................................. 42

C.3.4.6 Breakthrough criteria of used traps ..................................................................................................... 42

C.3.4.7 Paired trap agreement ............................................................................................................................... 42

C.3.4.8 Number of values to be determined ...................................................................................................... 42

C.3.4.9 Labelling .......................................................................................................................................................... 42

C.3.4.10 Relation to the plant conditions ........................................................................................................... 42

C.3.4.11 Volume proportional control ................................................................................................................ 42

C.3.4.12 Essential characteristic data ................................................................................................................. 42

Annex D (informative) Sorbent traps configurations .................................................................................. 43

D.1 Sorbent trap dimensions ........................................................................................................................... 43

D.2 Sorbent trap configurations ..................................................................................................................... 43

Annex E (normative) Reporting of sampling information .......................................................................... 45

E.1 Reporting ........................................................................................................................................................ 45

E.1.1 Short-term sampling ................................................................................................................................... 45

E.1.1.1 General ............................................................................................................................................................. 45

E.1.1.2 Basic information ......................................................................................................................................... 45

E.1.1.3 Sampling data for each trap ..................................................................................................................... 45

E.1.2 Long-term sampling .................................................................................................................................... 46

E.1.3 Interruption of data recording ................................................................................................................ 46

E.1.4 Reporting the validation of a long-term sampling system (from the manufacturer

and the test laboratory) ............................................................................................................................. 47

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Annex F (informative) Example uncertainty budget for mercury measurement using

sorbent traps .................................................................................................................................................. 48

F.1 Introduction.................................................................................................................................................... 48

F.2 Elements required for the uncertainty determinations ................................................................. 48

F.2.1 Model equation .............................................................................................................................................. 48

F.3 Example of an uncertainty calculation.................................................................................................. 48

F.3.1 Specific conditions in the field ................................................................................................................. 48

F.3.2 Performance characteristics .................................................................................................................... 50

F.4 Model equation and application of rule of uncertainty propagation ........................................ 51

F.4.1 Concentration of Hg ..................................................................................................................................... 51

F.4.1.1 General ............................................................................................................................................................. 51

F.4.1.2 Calculation of the combined uncertainty of V and C .................................................................... 52

m m
F.4.1.3 Based on Formula (F.1) the combined uncertainty of C can be expressed by

Formula (F.6): ................................................................................................................................................ 52

F.4.1.4 Calculation of sensitivity coefficients .................................................................................................... 53

F.4.1.5 Results of the standard uncertainties calculations .......................................................................... 53

F.4.1.6 Estimation of the combined uncertainty .............................................................................................. 55

Annex G (informative) Calculation of the uncertainty associated with correcting to dry gas

conditions at an oxygen reference concentration ............................................................................ 58

G.1 Uncertainty associated with a concentration expressed on dry gas .......................................... 58

G.2 Uncertainty associated with a concentration expressed at an oxygen reference

concentration ................................................................................................................................................. 60

Bibliography ................................................................................................................................................................. 62

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European foreword

This document (CEN/TS 17286:2019) has been prepared by Technical Committee CEN/TC 264 “Air

quality”, the secretariat of which is held by DIN.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

According to the CEN/CENELEC Internal Regulations, the national standards organisations of the

following countries are bound to announce this Technical Specification: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,

France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,

Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
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1 Scope

The purpose of this document is to establish performance benchmarks for, and to evaluate the

acceptability of, sorbent trap monitoring systems used to monitor total vapour- phase mercury (Hg)

emissions in stationary source flue gas streams. These monitoring systems involve continuous

repetitive in-flue sampling using paired sorbent traps with subsequent analysis of the time-integrated

samples.

This document is suitable for both short-term (periodic) measurements and long-term (continuous)

monitoring using sorbent traps.

NOTE When this Technical Specification has been validated, the sorbent trap method will be an Alternative

Method subject to the restrictions on applicability defined below. Until that time, EN 13211 is the only accepted

Reference Method for both short-term (periodic) measurements and for calibrating continuous monitoring

systems, including those with long-term sampling systems. EN 13211 is a wet chemistry approach that relies on

absorption of mercury into impinger solutions.

The substance measured according to this specification is the total vapour phase mercury in the flue

gas, which represents the sum of the elemental mercury (Hg ) and gaseous forms of oxidized mercury

(Hg ), such as mercury (II) chloride, in mass concentration units of micrograms (μg) per dry meter

3 3
cubed (m ). The analytical range is typically 0,1 to greater than 50 µg/m .

The sorbent tube approach is intended for use under relatively low particulate conditions (typically less

than 100 mg/m ) when monitoring downstream of all pollution control devices, e.g. at coal fired power

plants and cement plants. In this case, the contribution of mercury in the particulate fraction is

considered to be negligible (typically less than 5 % of total mercury). However, it shall be noted that the

sorbent trap does take account of the finest particle fraction that is sampled with the flue gas, in

addition to capturing the vapour phase mercury.

This specification also contains routine procedures and specifications that are designed to evaluate the

ongoing performance of an installed sorbent trap monitoring system. The operator of the industrial

installation is responsible for the correct calibration, maintenance and operation of this long-term

sampling system. Additional requirements for calibration and quality assurance of the long-term

sampling system are then defined in EN 14884 and EN 14181.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

EN 14181, Stationary source emissions — Quality assurance of automated measuring systems

EN 14790 (series), Stationary source emissions — Determination of the water vapour in ducts — Standard

reference method

EN 15259:2007, Air quality — Measurement of stationary source emissions — Requirements for

measurement sections and sites and for the measurement objective, plan and report

EN 15267 (series), Air quality — Certification of automated measuring systems

EN 15853, Ambient air quality — Standard method for the determination of mercury deposition

EN ISO 16911-1:2013, Stationary source emissions — Manual and automatic determination of velocity

and volume flow rate in ducts — Part 1: Manual reference method (ISO 16911-1:2013)

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