Published:Journal of Chromatographic Science,
ISSN 0021-9665Volume
39, Number 1, January 2001, pp. 12-20
Method
Development and Validation for the Determination of Various Sulfur-Containing
Anions and Other Anions in the Corrosion Process by Capillary Ion Electrophoresis
with Indirect DetectionHairui
Liang* Purdue University, School of Pharmacy and Pharmacal Sciences,
D711 Myers Building, 1001 West 10th Street, Indianapolis, IN 46202
A method of capillary ion electrophoresis with indirect detection
is developed for the simultaneous determination of the sulfur-containing anions
S2O42–, S2O32–,
SO42–, SO32–, and S2–
and other anions (Cl–, Br–, NO2–, NO3–,
(COO)22–, F–, and PO43–)
in the corrosion process. The effects of pH, tetradecyltrimethylammonium hydroxide,
chromate, 2-[n-cyclohexylamino]-ethane sulfonate, calcium gluconate, and acetonitrile
on the migration and resolution of the anions and the stability of sulfur-containing
anions are systematically investigated. The detection limits, repeatability,
and linearity for the anions are comparatively studied at 374, 274, and 254
nm, and the results show that 374 nm is the optimal length. The simultaneous
multiwavelength detection at 374, 254, 214, and 195 nm can assist in confirming
the identification of UV-absorbing anions.
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