Capillar Gas ChromatographyWith Laser Optothermal Detection | Zendy

Vladimir P. Zharov | Zendy; S. G. Montanari | Zendy

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Capillar Gas ChromatographyWith Laser Optothermal Detection

Author(s) -

Vladimir P. Zharov,

S. G. Montanari

Publication year - 1984

Publication title -

laser chemistry

Language(s) - English

Resource type - Journals

eISSN - 1026-8014

pISSN - 0278-6273

DOI - 10.1155/lc.5.133

Subject(s) - detector , laser , chemistry , spectrometer , resolution (logic) , sensitivity (control systems) , radiation , capillary action , gas chromatography ion detector , gas chromatography , optics , chromatography , analytical chemistry (journal) , physics , electronic engineering , artificial intelligence , computer science , thermodynamics , engineering

The design of a through-flow laser opto-thermal (OT) detector intended for operationas a selective chromatographic detector in combination with capillary columns isdescribed. The main advantage of such a detector is its relative simplicity and highspatial resolution. A new differential scheme of OT detector which can reduce thebackground signals of scattered radiation by about 10 2 times is suggested. The thresholdsensitivity of OT detector is experimentally estimated to be equal to about 7 ng (ethanol).The higher selectivity of the developed system “gas capillary chromatograph + laser OTspectrometer” has been demonstrated by analyzing a mixture of five atomatic hydrocarbonswith the use of a tunable CO 2 laser. Recommendations for further modificationof the equipment are given.

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