ISSN:
1432-1130
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract Capillary zone electrophoresis (CZE) was used for the separation of the sulfur species SO3 2–, SO4 2–, S2O3 2– and S2O8 2–. Using an electrolyte system with 9.5 mmol L–1 potassium chromate as UV-absorbing probe and 1 mmol L–1 diethylenetriamine (DETA) as electroosmotic flow modifier, various possibilities for the stabilization of sulfite and electrophoretic separation of the sulfur anions were investigated. By adding 5% propanol as a stabilizer to both the working electrolyte and the sample solution, a good stabilization for sulfite and a separation of the sulfur anions in a short analysis time (4 min) was achieved. The advantages by using propanol instead of other stabilizers often used in analytical techniques are discussed. The electrophoretic separation of the sulfur anions was optimized with respect to the pH of the working electrolyte and concentration of the electroosmotic flow modifier (DETA). The detection limits achieved for SO3 2–, SO4 2–, S2O3 2– and S2O8 2– were 0.35, 0.25, 0.78 and 0.80 mg L–1, respectively.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s002160000406
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