ISO/TS 16727:2013 PDF

Name: ISO/TS 16727:2013 — Soil quality — Determination of mercury — Cold vapour atomic fluorescence spectrometry (CVAFS)
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Soil quality — Determination of mercury — Cold vapour atomic fluorescence spectrometry (CVAFS)

Название (английский):

ISO/TS 16727:2013

Soil quality — Determination of mercury — Cold vapour atomic fluorescence spectrometry (CVAFS)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 6
Дата публикации:: 28 августа 2013 г.
Издание:: ISO TS 16727 edition 1 version 1
ICS:: 13.080.10

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Описание (английский):

ISO/TS 16727:2013 specifies a method for the determination of mercury in aqua regia or nitric acid digests of sludge, treated biowaste and soil, obtained according to ISO 11466 or ISO 16729 using cold vapour atomic fluorescence spectrometry. The lower working range limit is 0,003 mg/kg (dry matter).

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO/TS 16727:2013 specifies a laboratory procedure for the determination of mercury in sludge, treated biowaste and soil using cold vapour atomic fluorescence spectrometry (CVAFS / CV-AFS). The method applies to mercury measured in aqua regia or nitric acid digests prepared according to ISO 11466 or ISO 16729. The stated lower working range limit is 0.003 mg/kg (dry matter). The technique relies on chemical reduction of Hg to elemental vapor, carrier gas transport into an atomic fluorescence spectrometer and quantification via a calibration curve.

Key topics and technical requirements

Sample matrices: Digests from soil, sludge and treated biowaste (ISO 11466 / ISO 16729).

Detection method: Cold vapour atomic fluorescence spectrometry (Hg excitation around 254 nm; photomultiplier detection).

Reduction reagents: Tin(II)-chloride recommended; sodium borohydride may be used but can introduce additional interferences.

Carrier gas and gas purity: Argon or nitrogen; argon preferred for higher sensitivity; argon ≥ 99.99% recommended.

Calibration and quantitation: Use mercury standard solutions to prepare a multi-point calibration covering the measurement range; blank and test-blank procedures are required.

Working range examples: Direct determination for ~0.1–10 µg/L in digest (equivalent to ~0.003–0.3 µg/g for a 3.0 g sample); sensitivity may be increased by amalgamation or automated flow systems.

Interferences: Water vapour/aerosols (quenching), noble metals (gold, silver-amalgamation), anions that complex Hg (sulfide, iodide, bromide); recommended mitigation includes drying carrier gas and choice of reducing agent.

Apparatus: Clean laboratory glassware, atomic fluorescence spectrometer with Hg lamp and 254 nm filter, cold-vapour generator (batch or automated FIA/flow injection), optional automated sample introduction for ultra-trace sensitivity.

Applications and users

Environmental laboratories performing soil quality assessments, contamination surveys and regulatory compliance testing for mercury.

Waste and sludge testing facilities evaluating mercury in treated biowaste or sludges destined for land application or disposal.

Research labs conducting trace/ultra-trace mercury analyses in digested environmental samples.

Quality managers and technical staff responsible for method validation, instrument setup, calibration and interference control.

Related standards

ISO 11466 - Extraction of trace elements soluble in aqua regia

ISO 16729 - Digestion of nitric acid soluble fractions of elements

ISO 11465 - Determination of dry matter and water content

ISO 3696 - Water for analytical laboratory use

Keywords: ISO/TS 16727:2013, cold vapour atomic fluorescence spectrometry, CVAFS, mercury determination, soil quality, aqua regia digest, nitric acid digest, tin(II)-chloride, flow injection analysis.

ISO/TS 16727:2013 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and users

Related standards

Технические детали

SIST ISO 11466:1996

Soil quality -- Extraction of trace elements soluble in aqua regia

BS ISO 16729:2013

Soil quality. Digestion of nitric acid soluble fractions of elements.

SIST EN ISO 11465:2026

Sludge and solid environmental matrices - Determination of dry residue or water content and calculation of th…

SIST EN ISO 3696:1998

Water for analytical laboratory use - Specification and test methods (ISO 3696:1987)