Journal
ELECTROANALYSIS
Volume 17, Issue 3, Pages 223-230Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/elan.200403083
Keywords
microchip capillary electrophoresis; pulsed electrochemical detection; pulsed amperometric detection; carbohydrate; SDS
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There is a need to develop analytical methods that are capable of rapidly measuring small biological markers in the field of metabolomics. Among others, carbohydrates play an important role biologically yet are traditionally hard to detect since they have no chromophore or fluorophore. In the present report, the first application of integrated pulsed amperometric detection (iPAD) coupled with microchip electrophoresis to the analysis of glucose, mannose, sucrose, maltose. glucosamine, lactose, maltotriose and galactose is demonstrated. WAD is an electrochemical detection mode that can be used for direct detection of carbohydrates, amines and sulfur containing compounds. The effect of different solution parameters, including the buffer concentration, pH and the concentration of SDS on both separation and detection response was analyzed. In addition, a comparison study between PAD and WAD was performed using glucose, glucosamine, sucrose and maltose as model carbohydrates.
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