4.5 Article

Chromium speciation by the combination of high-performance liquid chromatography and inductively coupled plasma-optical emission spectrometry

Journal

ENVIRONMENTAL MONITORING AND ASSESSMENT
Volume 194, Issue 10, Pages -

Publisher

SPRINGER
DOI: 10.1007/s10661-022-10395-z

Keywords

Chromium; Speciation analysis; Environmental samples; HPLC; ICP-OES

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A hyphenated instrumental method combining HPLC and ICP-OES was developed for the precise determination of Cr(III) and Cr(VI) in soil, grass, and water samples. The method showed high accuracy and applicability.
A hyphenated instrumental method high-performance liquid chromatography-inductively coupled plasma-optical emission spectrometry (HPLC-ICP-OES) was used for the separation and determination of Cr(III) and Cr(VI). After the chromatographic separation of chromium species by anion exchange column, their spectrophotometric detection was carried out by ICP-OES system. Important instrumental and chromatographic parameters were investigated via univariate optimization approach to obtain high signal to noise ratio and good resolution for chromium species. Under the optimum HPLC-ICP-OES conditions, limit of detection (LOD) values for Cr(III) and Cr(VI) were found to be 0.27 and 0.05 mg/kg, respectively. In addition, accuracy and applicability of developed method were checked by recovery experiments performed with the spiked soil, grass, and water samples. High percent recovery results (88-104%) were achieved by utilizing matrix matching calibration strategy for the selected samples. The results showed that this method was accurate and applicable to soil, grass, and water samples.

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