Owing to its advantages of faster analysis, better precision, lower consumption of reagents and sample and readily automated operation, the on-line microcolumn preconcentration and separation technique have undergone rapid development since its advent in early eighties. It has a indispensable importance for the determination of trace and ultra-trace amount of analyte and complicated samples. A lot of research papers about it have been published and there have been commercial instruments available. However, ...
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