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Updated: Jul 16, 2026

Standards for Quantitative Metalloproteomic Analysis Using Size Exclusion ICP-MS
Published on: April 13, 2016
Short-column CE coupled with inductively coupled plasma MS for high-throughput speciation analysis of chromium
1Key Laboratory of Functional Polymer Materials, Ministry of Education, Research Center for Analytical Sciences, College of Chemistry, Nankai University, Tianjin, P. R. China.
Abstract:
A method was developed for high-throughput speciation analysis of chromium by on-line coupling of short-column capillary electrophoresis (SC-CE) and inductively coupled plasma mass spectrometry (ICP-MS). Baseline separation of Cr(III) and Cr(VI) was achieved within 1 min by SC-CE in a 15 cm x 75 microm id fused-silica capillary at 6 kV using 15 mM HNO(3) as running electrolyte. The precisions (RSD, n = 5) of migration time and peak area for Cr(III) and Cr(VI) were in the range of 1.8-2.4% and 2.2-5.7%, respectively. The limits of detection (3sigma) of Cr(III) and Cr(VI) were 1.8 and 1.9 microg/L, respectively. The synthesized samples containing Cr(III) and Cr(VI) species were determined by the developed SC-CE-ICP-MS hyphenated technique, and the recoveries of Cr(III) and Cr(VI) in the synthesized samples were in the range of 103-110% and 90-108%, respectively.
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