Application of Conductometric Capillary Electrophoresis Microchip in Detect Organic and Inorganic Ions

Conductivity detection can be considered electrochemical technique as well but has the ability to detect any analyte irrespective of whether it contains an or not. The authors used MEMS to fabricate the microelectrode. The microchannel was made by PDMS and modified by O2 plasma. In this study the authors detected organic components such as catechol, dopamine, histamine and vitamin C, and inorganic ions like K⁺, Li⁺ and Ca²⁺. In 30 sec electrokinetic injection time for individual sample detection was performed using a field strength (E) of 440 V/cm, and E = 230 V/cm for separation electrophoresis. Each sample can be detected less than 90 sec excluding catechol.