The Use of Silar 10 CP for the Packed Column Gas Chromatographic Determination of Chlorophenoxyacetic Acid Herbicides in Water and Sediments

Abstract

The determination of chlorophenoxyacetic acid herbicide residues was done with GC-ECD as pentafluorobenzyl derivatives. The herbicides were separated on a 3% Silar 10 CP column, which permits better resolution from interfering organic acids of environmental origin. The fortification study provides an 84–91% recovery for the water and sediment samples. The detection limits were established as 0.1 μg/1 for the water and 1.0–1.5 ng/g for the sediment samples. The use of a 3%Silar 10 CP packed column in the monitoring study as compared with a 1.5% OV-17 + 1.95% QF-1 one, shows the very small amount of contamination of the samples with these herbicide classes.

Key Words:

• Chlorophenoxyacetic acid
• water
• sediments
• GC-ECD