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ISO 11723:2025

Coal and coke — Determination of arsenic and selenium — Eschka's mixture and hydride generation method

Publication date:   Jun 25, 2025

General information

60.60   Standard published   Jun 25, 2025

ISO

ISO/TC 27/SC 5 Methods of analysis

International Standard

73.040   Coals | 75.160.10   Solid fuels

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Scope

This document specifies a method using Eschka's mixture during ashing, extraction of the ash residue with acid, and hydride generation atomic absorption spectrometry or hydride generation atomic fluorescence spectrometry, for the determination of arsenic and selenium in solid mineral fuels.
The method is also applicable for the determination of the analytes by hydride generation inductively coupled plasma atomic emission spectrometry.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 11723:2016

NOW

PUBLISHED
ISO 11723:2025
60.60 Standard published
Jun 25, 2025