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prEN ISO 18724

Water quality - Determination of dissolved chromium(VI) in water - Photometric method (ISO/DIS 18724:2024)

General information

Draft
Base Documents
ISO/DIS 18724; prEN ISO 18724
Directives or regulations
None
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Standard history

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prEN ISO 18724
This document specifies a method for the photometric determination of dissolved chromium(VI) using
manual, e.g., hand photometry, or automated static, e.g., discrete analyser system, or automated
dynamic techniques, e.g., flow injection analysis (FIA), continuous flow analysis (CFA), or ion
chromatography with post-column derivatization (IC-PCR). Typical areas of application for the static
techniques as well as FIA and CFA are samples with Cr(VI) concentrations 2 ÎĽg/l in raw water,
drinking water, surface water, aqueous eluates, cooling water and treated wastewater, provided that
the Matrix does not contain any reducing substances. When using cuvettes with large optical path
lengths, e.g. >100 mm, the range of application can be extended to concentrations 2 ÎĽg/l Cr(VI). When
using coupled techniques (e.g. IC-PCR), Cr(VI) concentrations 0,02 ÎĽg/l can be determined.
The NP is based on DIN 38405-52:2020-11.

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