Published: Journal of Chromatographic Science, Volume 36, Number 1, January 1998, pp. 33-36.
Characteristics and Calibration of
Conductivity Detection in Capillary Electrophoresis
C.A. Lucy and Q. Wu
The characteristics of end-column conductivity detection in capillary electrophoresis are investigated using solutes and background electrolytes that possess a range of mobilities. Indirect detection is most sensitive for low- to medium-mobility solutes. Detection limits are 1 ¥ 10–6M for hexane sulfonate, and the response is linear for over two orders of magnitude. A generalized response expression is developed for conductivity detection based on the similarities in conductivity and electrophoretic mobility.
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