Analysis of carbohydrates using liquid chromatography-surface plasmon resonance immunosensing systems

An immunosensing system based on surface plasmon resonance (SPR) was used f or on-line detection and characterization of carbohydrate molecules separat ed by high-performance liquid chromatography, These analytes, with or witho ut serum, were continuously separated and analyzed in the combined liquid c hromatography-surface plasmon resonance (LC-SPR) system, By; using weak and readily reversible monoclonal antibodies, the SPR system allowed specific on-line monitoring of the substances. To increase the specificity of the im munosensor, nonrelevant antibodies were used as reference in a serial flow cell. The sensitivity of the LC-SPR system was dependent on molecular weigh t of the carbohydrate, affinity of binding, and design of the sensor. (C) 2 000 Academic Press.