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Voltammetric Determination of Cr(VI) in Cr(VI)‐ and [Cr(VI)+Mn(IV)]‐Spiked Reference Soil Samples as a Function of Incubation Time and Extraction Procedures
Author(s) -
Desimoni Elio,
Genevini Pierluigi,
Tambone Fulvia,
Pikovic Simone,
Banfi Paolo
Publication year - 2000
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/(sici)1521-4109(20000301)12:5<337::aid-elan337>3.0.co;2-2
Subject(s) - hydroxide , chemistry , extraction (chemistry) , distilled water , carbonate , stripping (fiber) , cathodic stripping voltammetry , phosphate buffered saline , nuclear chemistry , inorganic chemistry , chromatography , voltammetry , electrochemistry , electrode , materials science , organic chemistry , composite material
In‐house reference soils were spiked with Cr(VI) or with Cr(VI) plus Mn(IV), incubated at constant humidity and temperature for different periods of time, extracted with distilled water, neutral phosphate buffer or carbonate/hydroxide solutions and tested for Cr(VI) by an adsorptive cathodic stripping voltammetric method. The extraction by carbonate/hydroxide was not satisfactory, likely because of electrode poisoning by some organic compounds. The results showed that extractions by water or neutral phosphate buffer are fully compatible with the AdCSV analysis of Cr(VI). The proposed procedure can be used to detect Cr(VI) in soil extracts down to µg/kg level.