Abstract
Two approaches to interfacing a suppressed ion chromatography (IC) system with a suppressed conductometric capillary electrophoresis (CE) separation system are described. The first interface uses a six-port loop valve which allows selective introduction of any segment of an IC eluite band into the CE system. This arrangement is also suitable as a sample delivery system, especially with CE systems using relatively short capillaries and high electric fields. In the second interface, a small fraction of the IC effluent passes through a length of Nafion tube immersed in a solution of saturated Na2B4O7. Thus, sufficient borax is introduced by Donnan penetration to increase the ionic strength of the flowing stream to an extent appropriate for carrying out CE separations. This valveless design allows the continuous injection of all IC eluite bands into the CE system without additional electrolyte preparation for CE. © 1997 John Wiley & Sons, Inc. J Micro Sep 8: 561–568, 1996
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