Journal
ELECTROPHORESIS
Volume 28, Issue 18, Pages 3284-3289Publisher
WILEY
DOI: 10.1002/elps.200600468
Keywords
CE; commercial equipment; direct analysis; in-line coupling; liquid-phase microextraction
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This work describes an efficient in-line extraction-preconcentration unit coupled to the electrophoretic capillary based on a liquid-phase microextraction (LPME) process, which can be directly assembled to the cartridge of the commercial CE equipment. The unit permits analyte extraction, preconcentration and electrophoretic separation to be automatically performed in the commercial CE equipment without the need for additional hardware or software. This new approach was usefully used for the separation and determination of nonsteroidal anti-inflammatory drugs in human urine permitting at least to analyze 30 consecutive real samples. The LODs were lower than 2 Vg/L and the reproducibility, expressed as RSD, was 3.1% for the same unit and only 4.8% between different units.
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