EN 16168:2012
(Main)Sludge, treated biowaste and soil - Determination of total nitrogen using dry combustion method
Sludge, treated biowaste and soil - Determination of total nitrogen using dry combustion method
This European Standard specifies the determination of total nitrogen (organic and inorganic) according to the procedure of Dumas in sludge, treated biowaste and soil. A typical limit of detection is 0,02 % nitrogen, and a typical limit of quantification is 0,08 % nitrogen.
Schlamm, behandelter Bioabfall und Boden - Bestimmung des Gesamt-Stickstoffgehalts mittels trockener Verbrennung
Diese Europäische Norm legt das von Dumas entwickelte Verfahren zur Bestimmung des Gesamt-Stickstoffs (organisch und anorganisch) in Schlamm, behandeltem Bioabfall und Boden fest. Eine typische Nachweisgrenze liegt bei 0,02 % Stickstoff und eine typische Bestimmungsgrenze liegt bei 0,08 % Stickstoff.
Boues, biodéchets traités et sols - Détermination de la teneur totale en azote par combustion sèche
La présente Norme européenne spécifie la détermination de la teneur totale en azote (organique et inorganique) selon le mode opératoire de Dumas dans les boues, les biodéchets traités et les sols. La limite de détection type est 0,02 % d'azote, et La limite de quantification type est 0,08 % d'azote.
Blato, obdelani biološki odpadki in tla - Določevanje celotnega dušika z metodo suhega sežiga
Ta evropski standard opredeljuje določevanje celotnega (organskega in anorganskega) dušika v skladu z Dumasovo metodo v blatu, obdelanih bioloških odpadkih in tleh. Običajna meja detekcije je 0,02 % dušika, meja kvantifikacije pa 0,08 % dušika.
General Information
Overview
EN 16168:2012 (CEN) specifies a standardized laboratory method for the determination of total nitrogen (organic + inorganic) in sludge, treated biowaste and soil using the Dumas dry combustion technique. The method converts all nitrogen to molecular nitrogen (N2) by combustion at a minimum of 850 °C and measures N2 (typically by thermal conductivity or device-specific detectors). Typical method performance: limit of detection ~0.02% N and limit of quantification ~0.08% N. Results are reported on a dry-matter basis (mg/kg or % dry matter).
Key topics and technical requirements
- Principle: Dry combustion (Dumas) of sample ≥850 °C in oxygen; conversion of nitrogen to NOx and N2, reduction to N2 and detector measurement.
- Reagents & gases: Use oxygen free of nitrogen, an inert carrier gas (e.g. helium) free of nitrogen, and grade-2 water.
- Calibration: Verify instrument calibration daily using certified calibration substances (e.g. EDTA, acetanilide, amino acids or matrix-matched references). Recalibrate if confirmation deviates >3%.
- Blanks & contamination control: Perform blank crucible determinations each series; monitor carrier gas and gas-bottle changes; avoid fingerprints and air trapped in sample pores (purge with inert gas).
- Sample handling: Follow EN 16179, EN 15934, ISO 18512 and EN ISO 5667-15 for pretreatment, drying and storage. Rapid drying recommended to limit N losses; moist samples permitted with appropriate dry-mass determination.
- Apparatus: Calibrated Dumas elemental analyser with compatible crucibles (1–20 mL or foil) and gas handling per manufacturer instructions.
- Calculation & reporting: Convert primary result (mg N) to dry-matter basis using EN 15934; express results to two significant figures.
- Validation: Performance characteristics and interlaboratory repeatability/reproducibility data are given in Annex A (validated across municipal sludges, composts and soils).
Applications and users
- Routine environmental and regulatory monitoring of sludge, compost/treated biowaste, and agricultural or contaminated soils.
- Laboratories performing nitrogen analysis, wastewater treatment plant QA, composting facilities, soil testing labs, environmental consultants and research groups.
- Useful for compliance testing, process control (e.g., compost maturity), nutrient accounting, and risk assessment where accurate total nitrogen measurement is required.
Related standards
- EN 15934 - dry matter determination (for reporting on dry basis)
- EN 16179 - guidance for sample pretreatment (sludge, biowaste, soil)
- EN ISO 3696, EN ISO 5667-15, ISO 18512 - water/gas/sample storage and handling guidance
- ISO 13878, EN 13654-2 - related nitrogen/elemental analysis methods
EN 16168 is a practical, validated standard for reliable total nitrogen determination by dry combustion, helping laboratories meet consistent quality and regulatory requirements across Europe.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Schlamm, behandelter Bioabfall und Boden - Bestimmung des Gesamt-Stickstoffgehalts mittels trockener VerbrennungBoue, biodéchet traité et sol - Détermination de la teneur totale en azote par combustion sècheSludge, treated biowaste and soil - Determination of total nitrogen using dry combustion method13.080.10Chemical characteristics of soils13.030.20Liquid wastes. SludgeICS:Ta slovenski standard je istoveten z:EN 16168:2012SIST EN 16168:2013en,fr,de01-februar-2013SIST EN 16168:2013SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16168
August 2012 ICS 13.030.01; 13.080.10 English Version
Sludge, treated biowaste and soil - Determination of total nitrogen using dry combustion method
Boues, biodéchets traités et sols - Détermination de la teneur totale en azote par combustion sèche
Schlamm, behandelter Bioabfall und Boden - Bestimmung des Gesamt-Stickstoffgehalts mittels trockener Verbrennung This European Standard was approved by CEN on 24 May 2012.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 16168:2012: ESIST EN 16168:2013
Repeatability and reproducibility data .9A.1 Materials used in the interlaboratory comparison study .9A.2 Interlaboratory comparison results . 10Bibliography . 11 SIST EN 16168:2013
WARNING — Persons using this European Standard should be familiar with usual laboratory practice. This European Standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user to establish appropriate safety and health practices and to ensure compliance with any national regulatory conditions. IMPORTANT — It is absolutely essential that tests conducted according to this European Standard be carried out by suitably trained staff.
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Frequently Asked Questions
EN 16168:2012 is a standard published by the European Committee for Standardization (CEN). Its full title is "Sludge, treated biowaste and soil - Determination of total nitrogen using dry combustion method". This standard covers: This European Standard specifies the determination of total nitrogen (organic and inorganic) according to the procedure of Dumas in sludge, treated biowaste and soil. A typical limit of detection is 0,02 % nitrogen, and a typical limit of quantification is 0,08 % nitrogen.
This European Standard specifies the determination of total nitrogen (organic and inorganic) according to the procedure of Dumas in sludge, treated biowaste and soil. A typical limit of detection is 0,02 % nitrogen, and a typical limit of quantification is 0,08 % nitrogen.
EN 16168:2012 is classified under the following ICS (International Classification for Standards) categories: 13.030.01 - Wastes in general; 13.080.10 - Chemical characteristics of soils. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 16168:2012 is associated with the following European legislation: EU Directives/Regulations: 86/278/EEC; Standardization Mandates: M/330. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
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