ISO 12141:2024
(Main)Stationary source emissions — Determination of low range mass concentration of dust — Manual gravimetric method
Stationary source emissions — Determination of low range mass concentration of dust — Manual gravimetric method
This document specifies the standard reference method (SRM) for the measurement of low dust concentration in ducted gaseous streams in the concentrations below 50 mg/m3 at standard conditions. This document is primarily developed and validated for gaseous streams emitted by waste incinerators. More generally, it can be applied to gases emitted from other stationary sources, and to higher concentrations. If the gases contain unstable, reactive or semi-volatile substances, the measurement depends on the sampling and filter treatment conditions. This method has been validated in field tests with special emphasis to dust concentrations around 5 mg/m3. The results of the field tests are presented in Annex A.
Émissions de sources fixes — Détermination de faibles concentrations en masse de poussières — Méthode gravimétrique manuelle
L'ISO 12141-2002 décrit une méthode de référence pour le mesurage de concentrations de matières particulaires (poussières) dans des effluents gazeux inférieures à 50 mg/m3 dans les conditions normales, et plus particulièrement pour des concentrations voisines de 5 mg/m3. L'ISO 12141-2002 a été élaborée et validée pour les écoulements gazeux émis par des incinérateurs d'ordures ménagères. De manière plus générale, elle peut être appliquée aux émissions provenant d'autres sources fixes, et à des concentrations supérieures. Si les gaz contiennent des substances instables, réactives ou semi-volatiles, le mesurage dépendra des conditions d'échantillonnage et de traitement du filtre.
Emisije nepremičnih virov - Določanje nizkih masnih koncentracij delcev (prahu) - Ročna gravimetrijska metoda
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Standards Content (Sample)
International
Standard
ISO 12141
Second edition
Stationary source emissions —
2024-09
Determination of low range mass
concentration of dust — Manual
gravimetric method
Émissions de sources fixes — Détermination de faibles
concentrations en masse de poussières — Méthode gravimétrique
manuelle
Reference number
© ISO 2024
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Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviations . 5
4.1 Symbols .5
4.2 Abbreviations .5
5 Principle . 6
6 Measurement planning and sampling strategy . 6
6.1 Measurement planning .6
6.2 Sampling strategy .7
6.2.1 General .7
6.2.2 Measurement section and measurement plane .7
6.2.3 Minimum number and location of measurement points .7
6.2.4 Measurement ports and working platform .7
7 Equipment and materials . 8
7.1 Gas velocity, temperature, pressure and composition measurement devices .8
7.2 Sampling equipment .8
7.2.1 Sampling system .8
7.2.2 Filtration device .8
7.2.3 Entry nozzle . 12
7.2.4 Suction tube for out-stack filtration devices . 12
7.2.5 Suction unit . 12
7.2.6 Gas metering devices . 12
7.3 Dust deposit recovery accessories .14
7.4 Equipment for conditioning and weighing .14
8 Weighing procedure . 14
8.1 General .14
8.2 Pre-sampling conditioning .14
8.3 Weighing . 15
8.4 Post-sampling treatment of weighed parts . 15
8.5 Post-sampling treatment of the rinsing solutions .16
8.6 Improvement of the weighing procedure .16
9 Sampling procedure .16
9.1 Preparation .16
9.2 Filter handling.17
9.3 Pre-measurements . .17
9.4 Leak test .18
9.5 Sampling .18
9.6 Recovery of deposits upstream of the filter .19
9.6.1 General .19
9.6.2 Rinsing procedure . . . 20
9.7 Field blank . 20
10 Calculation .20
10.1 Sampling volumetric flow rate . 20
10.2 Dust concentration .21
11 Measurement report .21
Annex A (informative) Performance characteristics of the method obtained in the method
validation .23
iii
Annex B (informative) Influence of the isokinetic rate on the representativeness of the
collected particles .25
Annex C (informative) Proven design of the entry nozzles .31
Annex D (informative) Summary of the requirements .33
Annex E (normative) Sampling volume, flow rate and duration .34
Annex F (informative) Examples of weighing bias .35
Annex G (informative) Determination of the measurement uncertainty .37
Annex H (informative) Thermal behaviour of dusts . 51
Annex I (informative) Significant technical changes .52
Bibliography .53
iv
Foreword
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of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
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