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Capillary electrophoresis speciation of chromium in leather tanning liquor
Author(s) -
Poboży Ewa,
Knell Mark,
Kilian Krzysztof,
Kataky Ritu,
Trojanowicz Marek
Publication year - 2003
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.200305461
Subject(s) - chromium , chemistry , capillary electrophoresis , absorbance , hydroxide , genetic algorithm , mass spectrometry , inductively coupled plasma mass spectrometry , spectrophotometry , chromatography , analytical chemistry (journal) , inorganic chemistry , organic chemistry , evolutionary biology , biology
We present a method for the speciation of chromium by capillary electrophoresis. Cr(III) was complexed with diethylenetriaminepentaacetic acid (DTPA) to form a negatively charged complex. Using 20 m M phosphate buffer of pH 8 containing 0.5 m M tetradecyltrimethylammonium hydroxide (TTAOH) at a separation voltage of –15 kV, both forms of chromium CrDTPA 2– and CrO 4 2– were separated in less than 6 min. Direct UV detection at 214 nm was used. The effect of the presence of interfering ions was investigated. The application of the developed method to speciation of chromium in tanning liquor is demonstrated. The obtained results have shown a good correlation with those of flame atomic absorbance spectrometry (FAAS), inductively coupled plasma‐mass spectrometry (ICP‐MS) and UV/VIS spectrophotometry.