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- W1987571581 abstract "A method for the preconcentration and speciation of chromium was developed. On-line preconcentration and determination were obtained using inductively coupled plasma optical emission spectrometry (ICP-OES) coupled with flow injection. To determinate the chromium (III) present in parenteral solutions, chromium was retained on activated carbon at pH 5.0. On the other hand, a step of reduction was necessary in order to determine total chromium content. The Cr(VI) concentration was then determined by difference between the total chromium concentration and that of Cr(III). A sensitivity enrichment factor of 70-fold was obtained with respect to the chromium determination by ICP-OES without preconcentration. The detection limit for the preconcentration of 25 ml of sample was 29 ng l−1. The precision for the 10 replicate determinations at the 5 μg l−1 Cr level was 2.3% relative standard deviation, calculated with the peak heights. The calibration graph using the preconcentration method for chromium species was linear with a correlation coefficient of 0.9995 at levels near the detection limits up to at least 60 μg l−1. The method can be applied to the determination and speciation of chromium in parenteral solutions." @default.
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- W1987571581 date "2005-04-01" @default.
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- W1987571581 title "On-line preconcentration and determination of chromium in parenteral solutions by inductively coupled plasma optical emission spectrometry" @default.
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- W1987571581 doi "https://doi.org/10.1016/j.sab.2005.02.008" @default.
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