DANSK DSF/PREN ISO 18724 [ Draft ]

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 �g/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 �g/l Cr(VI). When using coupled techniques (e.g. IC-PCR), Cr(VI) concentrations 0,02 �g/l can be determined. The NP is based on DIN 38405-52:2020-11.