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- W2012053774 abstract "A rapid and sensitive method has been proposed for the sequential determination of chromium(III) and total chromium in water samples by flame atomic absorption spectrometry combined with a flow injection on-line preconcentration on a double-microcolumn. The chromium(III) and total chromium in samples were retained on a double-microcolumn with a cation exchange resin, respectively, and eluted directly into a nebulizer by 3 mol L(-1) HNO3. The characteristic concentration (gives a derivative absorbance of 0.0044) and the detection limit (3sigma) for chromium were 0.512 microg L(-1) and 0.647 microg L(-1) for a preconcentration time of 1 min, respectively. This is an improvement of 20 and 14-times than those of conventional FI-FAAS. The proposed method allows the determination of chromium in the range of 0-90 microg L(-1) with a relative standard deviation of 3.63% at the 10 microg L(-1) level. The method has been applied for the analysis of chromium in reference water of National Research Center for Certified Reference Materials (GBW08607) and other water samples with satisfactory results." @default.
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- W2012053774 date "2003-04-01" @default.
- W2012053774 modified "2023-09-27" @default.
- W2012053774 title "Determination of Chromium(III) and Total Chromium in Water by Derivative Atomic Absorption Spectrometry Using Flow Injection On-line Preconcentration with a Double Microcolumn" @default.
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- W2012053774 doi "https://doi.org/10.2116/analsci.19.589" @default.
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