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Short‐column CE coupled with inductively coupled plasma MS for high‐throughput speciation analysis of chromium
Author(s) -
Li BaoHui,
Yan XiuPing
Publication year - 2007
Publication title -
electrophoresis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.666
H-Index - 158
eISSN - 1522-2683
pISSN - 0173-0835
DOI - 10.1002/elps.200600540
Subject(s) - chromium , inductively coupled plasma mass spectrometry , chemistry , capillary electrophoresis , analytical chemistry (journal) , detection limit , inductively coupled plasma , mass spectrometry , chromatography , genetic algorithm , plasma , physics , organic chemistry , quantum mechanics , evolutionary biology , biology
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×75 μm 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 (3σ) of Cr(III) and Cr(VI) were 1.8 and 1.9 μg/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.