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Microfabricated arrays consisting of four individually addressable band electrodes have been used for end-column electrochemical detection in capillary electrophoresis (CE), The commercially available array was positioned 75-300 mu m from the capillary o, Addresses: Nyholm L, Univ Uppsala, Dept Analyt Chem, POB 531, SE-75121 Uppsala, Sweden. Univ Uppsala, Dept Analyt Chem, SE-75121 Uppsala, Sweden.

An end-column microelectrochemical detector, based on a 25 mu m platinum electrode, was used in miniaturised flow and separation systems, at linear mobile phase velocities below 0.1 cm s(-1) (i.e. a volumetric flow of a few mu l min(-1) for a 200 mu m i, Addresses: UNIV UPPSALA, DEPT ANALYT CHEM, S-75121 UPPSALA, SWEDEN.

Oxidative and reductive amperometric detection of phenols, nitroaromatic compounds and a cyclic ketone is demonstrated in packed capillary column supercritical fluid chromatography (SFC). The detection was performed in combination with isobaric, as well, Addresses: UPPSALA UNIV, DEPT ANALYT CHEM, S-75121 UPPSALA, SWEDEN.

A flow system is described in which stable preplated mercury coatings on microelectrodes can be obtained due to minimised handling of the electrode and the fact that potentiostatic control can be maintained also between the experiments. Compared to the d, Addresses: UNIV UPPSALA, INST CHEM, DEPT ANALYT CHEM, S-75121 UPPSALA, SWEDEN.

The stability of preplated mercury coatings on platinum and carbon fibre microelectrodes has been studied both after transfer of the electrodes to a mercury free solution and at open circuit in Hg(I) and Hg(II) solutions. While significant amounts of mer, Addresses: Nyholm L, UNIV UPPSALA, DEPT ANALYT CHEM, POB 531, S-75121 UPPSALA, SWEDEN.

A flow system is described in which stable preplated mercury coatings on microelectrodes can be obtained due to minimised handling of the electrode and the fact that potentiostatic control can be maintained also between the experiments. Compared to the d, Addresses: UNIV UPPSALA, INST CHEM, DEPT ANALYT CHEM, S-75121 UPPSALA, SWEDEN.

The stability of preplated mercury coatings on platinum and carbon fibre microelectrodes has been studied both after transfer of the electrodes to a mercury free solution and at open circuit in Hg(I) and Hg(II) solutions. While significant amounts of mer, Addresses: Nyholm L, UNIV UPPSALA, DEPT ANALYT CHEM, POB 531, S-75121 UPPSALA, SWEDEN.