Gas-liquid chromatography is widely used in pesticide residue analysis, and numerous packings of various polarity are recommended. We selected OV-22, OV-101, NPGS, SE-30 (3% on Gas-Chrom Q), and 1.95% SP-2401/1.5% SP-2250 on Supelcoport as basic packings. Relative retention times for aldrin and parathion-methyl were determined at 140, 160, 180, or 200°C and during temperature programming. OV-22 and OV-101 were most suitable for general purposes. A study on the performance of thermionic detectors suggested that their performance can be characterized and should be regularly controlled with test substances containing different hetero elements. Columns as short as 45-90 cm were suitable for screening purposes, and their advantages over traditional long columns are demonstrated. The fractionation of pesticides in an extract on silica gel columns was effective and practical for the confirmation of pesticides.
|Number of pages||20|
|Journal||Journal of the Association of Official Analytical Chemists|
|Publication status||Published - Jan 1 1981|
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