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Stacking from the Sample Stream in CZE Using a Pneumatically Driven Computerized Sampler
1Department of Chemistry, Tallinn Technical University, Ehitajate tee 5, Tallinn EE0026, Estonia.
Abstract:
It is demonstrated that a pneumatically driven computerized sampling device for capillary electrophoresis facilitates sample stacking by the head-column field amplification (HCFA) technique. This device utilizes a rapid exchange between buffer and sample in a narrow channel at the separation capillary inlet and makes possible the combination of two classical injection modes [Formula: see text] the electrokinetic and hydrodynamic modes. Detection limits obtained were about 9 nM for alkylbenzylamine cations with common UV detection.
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