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13.060.50 Examination of water for chemical substances
New standards
EVS-EN ISO 18127:2026
Water quality - Determination of adsorbable organically bound fluorine, chlorine, bromine and iodine (AOF, AOCl, AOBr, AOI) - Method using combustion and subsequent ion chromatographic measurement (ISO 18127:2026)
Scope: This document specifies a method for the determination of organically bound halogens fluorine, chlorine, bromine and iodine which are adsorbable on activated carbon. Adsorption takes place on activated carbon packed in columns.
The method is applicable for the determination of:
≥ 2 µg/l AOF, expressed as F;
≥ 10 µg/l AOCl, expressed as Cl;
≥ 1 µg/l AOBr, expressed as Br;
≥ 1 µg/l AOI, expressed as I.
The method is applicable for the determination of adsorbable organically bound fluorine, chlorine, bromine and iodine in water, e.g. in groundwater, surface water, bank filtrate, drinking water, aqueous eluates, cooling water and wastewater.
The working range is limited by the capacity of the activated carbon, the process blank and the capacity of the chromatographic separation column. Sample dilution into the working range can be required.
The range of application can be extended to lower concentrations with lower process blanks e.g. using low blank activated carbons.
The method can also be applied for samples containing suspended solids. Halogens adsorbed on the suspended solids (e.g. undissolved halides) are also determined. Filtration of the sample prior to analysis using a membrane filter (0,45 µm) allows the separate determination of dissolved adsorbable and particulate bound fractions of organically bound fluorine, chlorine, bromine or iodine.
Results from an international interlaboratory trial are presented in Annex K.
The method is applicable for the determination of:
≥ 2 µg/l AOF, expressed as F;
≥ 10 µg/l AOCl, expressed as Cl;
≥ 1 µg/l AOBr, expressed as Br;
≥ 1 µg/l AOI, expressed as I.
The method is applicable for the determination of adsorbable organically bound fluorine, chlorine, bromine and iodine in water, e.g. in groundwater, surface water, bank filtrate, drinking water, aqueous eluates, cooling water and wastewater.
The working range is limited by the capacity of the activated carbon, the process blank and the capacity of the chromatographic separation column. Sample dilution into the working range can be required.
The range of application can be extended to lower concentrations with lower process blanks e.g. using low blank activated carbons.
The method can also be applied for samples containing suspended solids. Halogens adsorbed on the suspended solids (e.g. undissolved halides) are also determined. Filtration of the sample prior to analysis using a membrane filter (0,45 µm) allows the separate determination of dissolved adsorbable and particulate bound fractions of organically bound fluorine, chlorine, bromine or iodine.
Results from an international interlaboratory trial are presented in Annex K.
Base documents: ISO 18127:2026; EN ISO 18127:2026
Replaced standards
EVS-EN ISO 18412:2006
Water quality - Determination of chromium(VI) - Photometric method for weakly contaminated water
Scope: This International Standard specifies a method for the determination of chromium(VI) in drinking water in mass concentrations between 2 μg/l and 50 μg/l. For the determination of higher concentrations, the sample is diluted prior to analysis.
Base documents: ISO 18412:2005; EN ISO 18412:2006
Replaced: EVS-EN ISO 18724:2025
EVS-EN ISO 23913:2009
Water quality - Determination of chromium(VI) - Method using flow analysis (FIA and CFA) and spectrometric detection
Scope: This International Standard specifies flow injection analysis (FIA) and continuous flow analysis (CFA) methods for the determination of chromium(VI) in various types of water. The method applies to the following mass concentration ranges. FIA: 20 µg/l to 200 µg/l and 200 µg/l to 2 000 µg/l for surface water, leachates and waste water. CFA: 2 µg/l to 20 µg/l and 20 µg/l to 200 µg/l for drinking water, ground water, surface water, leachates and waste water. The range of application may be changed by varying the operating conditions. Seawater may be analysed by these methods with changes in sensitivity and after adaptation of the reagent and calibration solutions to the salinity of the samples.
Base documents: ISO 23913:2006; EN ISO 23913:2009
Replaced: EVS-EN ISO 18724:2025