... analysis of drugs in urine samples. Science China-Chemistry, Vol .53 , No .5, pp. 1183-1189, ISSN 1674-7291. Column Coupling Electrophoresis in Biomedical Analysis 117 -casein at sub-micromolar ... of insulin chain B, cytochrome c and Biomedical Engineering – From Theory to Applications 128 chip with conductivity detection. Electrophoresis, Vol. 25, No.21-22, pp. 38 65- 3874, ISSN 152 2-2683. ... acid, pH 4. 75 as a leading electrolyte (ITP), 5 mM -aminocaproic acid - acetic acid, pH 4 .5 as a terminating electrolyte (ITP), and 25 mM -aminocaproic acid - acetic acid, pH 4 .5 as a carrier...