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  • P-ISSN 1225-0163
  • E-ISSN 2288-8985

Analysis of the Anionic Surfactants by Capillary Electrophoresis

Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1994, v.7 no.4, pp.435-440
Jeong, Hyuk
Kim, Seung Sun
Lee, Byung Min
Kang, Ho-Cheol
Lee, Won
Kim, Hai-Dong
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Abstract

Qualitative and quantitative analysis for the anionic surfactants used in the metal washing fluid (brand names are BFA and BCA) was performed by the capillary electrophoresis. Acetonitrile and sodium benzoate were mixed with the buffer solution which controlled at pH 10. Under the 18kV applied voltage, the electropherograms have shown the theoretical plates more than <TEX>$10^4$</TEX>. Determined as the concentration at the S/N~3, the typical detection limit was ~5 ppm and the calibration curves have shown the correlation coefficients higher than ~0.99. Based on these results, it was concluded that each components were octanoate, decanoate, dodecanoate, tetradecanoate, hexadecanoate and the relative ratio was 1.0 : 1.0 : 6.5 : 2.1 : 0.8 for the BFA.

keywords
Capillary Electrophoresis, Surfactant


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Analytical Science and Technology