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http://acervodigital.unesp.br/handle/11449/37240
- Title:
- Indirect determination of chloride and sulfate ions in alcohol fuel by capillary electrophoresis
- Universidade de São Paulo (USP)
- Universidade Estadual Paulista (UNESP)
- 1618-2642
- A capillary zone electrophoresis method using indirect UV detection for the analysis of chloride and sulfate in alcohol fuel samples was developed. The anions were analyzed in less than 3 min using an electrolyte containing 10 mmol 1(-1) chromate and 0.75 mmol 1(-1) hexamethonium bromide (HMB) as electroosmotic flow modifier. Coefficients of variation were better than 0.6% for migration time (n = 10) and between 2.05 and 2.82% for peak area repeatabilities. Analytical curves of peak area versus concentration in the range of 0.065-0.65 mg kg(-1) for chloride and 0.25-4.0 mg kg(-1) for sulfate were linear with coefficients of correlation higher than 0.9996. The limits of detection for sulfate and chloride were 0.033 and 0.041 mg kg(-1), respectively. Recovery values ranged from 85 to 103%. The method was successfully applied for the quantification of sulfate and chloride in five alcohol fuel samples. The concentration of sulfate varied from 0.45 to 3.12 mg kg(-1). Chloride concentrations were below the method's LOD.
- 1-Sep-2004
- Analytical and Bioanalytical Chemistry. Heidelberg: Springer Heidelberg, v. 380, n. 1, p. 178-182, 2004.
- 178-182
- Springer
- capillary electrophoresis
- inorganic anions
- alcohol fuel
- http://dx.doi.org/10.1007/s00216-004-2725-8
- Acesso restrito
- outro
- http://repositorio.unesp.br/handle/11449/37240
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