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. 2002 Nov;23(21):3781-6.
doi: 10.1002/1522-2683(200211)23:21<3781::AID-ELPS3781>3.0.CO;2-L.

High-voltage contactless conductivity detection of metal ions in capillary electrophoresis

Jatisai Tanyanyiwa  1 , Peter C Hauser
Affiliations

High-voltage contactless conductivity detection of metal ions in capillary electrophoresis

Jatisai Tanyanyiwa et al. Electrophoresis. 2002 Nov.

Abstract

The detection of alkali, alkaline earth and heavy metal ions with a high-voltage capacitively coupled contactless conductivity detector (HV-C(4)D) was investigated. Eight alkali, alkaline earth metal ions and ammonium could be separated in less than 4 min with detection limits in the order of 5 x 10(-8) M. The heavy metals Mn2+, Pb2+, Cd2+ Fe2+, Zn2+, Co2+, Cu2+ and Ni2+ could also be successfully resolved with a 10 mM 2-(N-morpholino)ethanesulfonic acid/DL-histidine (MES/His)-buffer. Zn2+, Co2+, Cu2+ and Ni2+ showed an indirect response. The detection limits for the heavy metals were determined to range from about 1 to 5 microM.

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