A Robust Flow-Based System for the Spectrophotometric Determination of Cr(VI) in Recreational Waters

A flow-based method for the spectrophotometric determination of chromium (VI) in recreational waters with different salinities was developed. Chromium can occur in the environment in different oxidation states with different related physiological properties. With regard to chromium, the speciation i...

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Bibliographic Details
Published in:Molecules (Basel, Switzerland) Switzerland), 2022-03, Vol.27 (7), p.2073
Main Authors: Ribas, Tânia C F, Mesquita, Raquel B R, Machado, Ana, Miranda, Joana L A, Marshall, Graham, Bordalo, Adriano, Rangel, António O S S
Format: Article
Language:English
Subjects:
Calibration
Carcinogens
Chromium
Chromium - analysis
Cr(VI)
Diphenylcarbazide
DPC
dynamic water systems
Ethanol
GlobalFIA
Hexavalent chromium
ISO standards
Metal ions
Methods
Oxidation
Reagents
Recreational waters
Scientific imaging
sequential injection analysis
Speciation
Spectrophotometry
Spectrophotometry - methods
Standard deviation
Sulfuric acid
Water
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Summary:A flow-based method for the spectrophotometric determination of chromium (VI) in recreational waters with different salinities was developed. Chromium can occur in the environment in different oxidation states with different related physiological properties. With regard to chromium, the speciation is particularly important, as the hexavalent chromium is considered to be carcinogenic. To achieve that purpose, the use of the diphenylcarbazide (DPC) selective colored reaction with the hexavalent chromium was the chosen strategy. The main objective was to develop a direct and simple spectrophotometric method that could cope with the analysis of different types of environmental waters, within different salinity ranges (fresh to marine waters). The potential interference of metal ions, that can usually be present in environmental waters, was assessed and no significant interferences were observed (
ISSN:1420-3049
1420-3049
DOI:10.3390/molecules27072073