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- W1963565304 abstract "A novel screen-printed carbon electrode modified with quercetin/multi-walled carbon nanotubes was fabricated for determination of Cr(VI) in the presence of excess of Cr(III) without any pretreatment. The method is based on accumulation of the quercetin–Cr(III) complex generated in situ from Cr(VI) at the modified electrode surface in an open circuit followed by differential pulse voltammetry detection. The new method allowed selective determination of Cr(VI) in the presence of Cr(III). The influence of various parameters affecting the adsorptive stripping voltammetry performance was investigated. Under the optimum conditions, the calibration plot was found to be linear in the Cr(VI) concentration range from 1.0 to 200 μmol− 1 with a limit of detection(S/N = 3) of 0.3 μmol L– 1. The relative standard deviation (RSD%) of seven replicates of the current measurements for a 50 μmol− 1 of Cr(VI) solution was 3.0%. The developed electrode displayed a very low or no sensitivity to alkali, alkali-earth and transition metal cations and was successfully applied for the determination of Cr(VI) in drinking water samples." @default.
- W1963565304 created "2016-06-24" @default.
- W1963565304 creator A5037014679 @default.
- W1963565304 creator A5038188647 @default.
- W1963565304 date "2013-12-01" @default.
- W1963565304 modified "2023-10-18" @default.
- W1963565304 title "A highly sensitive and selective electrochemical sensor for determination of Cr(VI) in the presence of Cr(III) using modified multi-walled carbon nanotubes/quercetin screen-printed electrode" @default.
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- W1963565304 doi "https://doi.org/10.1016/j.msec.2013.08.020" @default.
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