Open AccessSpeciation of Chromium in Seawater by ICP-AES with Dual Mini-columns Containing Chelating Resin
Author(s) -
Takashi Sumida,
Akhmad Sabarudin,
Mitsuko Oshima,
Shoji Motomizu
Publication year - 2006
Publication title -
analytical sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.392
H-Index - 73
eISSN - 1348-2246
pISSN - 0910-6340
DOI - 10.2116/analsci.22.161
Subject(s) - chemistry , chromium , seawater , chelating resin , effluent , chelation , inductively coupled plasma atomic emission spectroscopy , detection limit , genetic algorithm , inductively coupled plasma mass spectrometry , inductively coupled plasma , column chromatography , chromatography , nuclear chemistry , analytical chemistry (journal) , environmental chemistry , mass spectrometry , inorganic chemistry , metal , metal ions in aqueous solution , oceanography , plasma , physics , organic chemistry , engineering , quantum mechanics , evolutionary biology , environmental engineering , geology , biology
A method for the preconcentration and speciation of chromium in seawater was developed. On-line preconcentration and determination were carried out by using inductively coupled plasma atomic emission spectrometry (ICP-AES) with dual mini-columns containing a chelating resin. In this system, Cr(III) was collected on the first column. The effluent containing residual chromium from the first column was collected on the second column after passing through a reduction-switching unit, in which the reducing agent was introduced, or not, for the reduction of Cr(VI) to Cr(lII). Cr(VI) was determined as the difference between the concentration of pre-reduced Cr(VI) and Cr(III) in the effluent from the first column. The detection limits for Cr(III) and Cr(VI) were 0.04 and 0.09 microg l(-1), respectively.
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