DIN Standards Committee Water Practice
Water quality - Determination of dissolved chromium(VI) in water - Photometric method (ISO/DIS 18724:2024)
Abstract
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.
Begin
2023-04-26
WI
00230431
Planned document number
prEN ISO 18724
Responsible national committee
NA 119-01-03-01-28 AK - Phototmetry methods
