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Microcolumn liquid chromatography of the enantiomers of organophosphorus pesticides with thermionic and ultraviolet detection

✍ Scribed by Kientz, Charles E. ;Langenberg, Jan P. ;de Jong, Gerhardus J. ;Th. Brinkman, Udo A.

Publisher
John Wiley and Sons
Year
1991
Tongue
English
Weight
430 KB
Volume
14
Category
Article
ISSN
0935-6304

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✦ Synopsis

Abstract

Microcolumn liquid chromatography (micro‐LC) of some chiral organophosphorus pesticides has been studied using Chiralcel OD columns and simultaneous ultraviolet (UV) and phosphorus selective detection, the latter by means of a micro‐UV cell coupled on‐line to a thermionic detector (TID). Micro‐LC showed a ca. 5‐fold improved separation impedance, a ca. 1.8‐fold increased column permeability, and greater inertness compared with conventional LC.

By using the TID, organophosphorus pesticides could be satisfactorily determined at trace levels, the detection limit being 4 pg/s of phosphorus. The response of the micro‐LC‐TID system is linear in the range of 0.05–20 ng (r = 0.9994).

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