title: Nitrogen-sensitive thermionic detection in microcolumn liquid chromatography.
abstract: The dual-flame thermionic detector for microcolumn liquid chromatography has been improved and optimized for nitrogen sensitivity. The total column effluent is concentrically nebulized and aspirated directly into an air-hydrogen diffusion flame, while detection limits of 1.4 X 10(-11) g nitrogen/sec at the maximum of a Gaussian peak are achieved. Detection linearity spans three orders of magnitude. An example of the analysis of underivatized barbiturate standards is provided.
mesh_terms: D001463:Barbiturates / Q000032:analysis; D002853:Chromatography, Liquid / Q000295:instrumentation*; D007202:Indicators and Reagents; D009584:Nitrogen; D013696:Temperature
chemical_list: D001463:Barbiturates; D007202:Indicators and Reagents; D009584:Nitrogen