Determination of the Pesticides in Environmental Water by GC/MS with Disk-format Solid Phase Extraction Method

Hideaki KITAMI*, Tetsuo WATANABE, Takio KITAHARA†† and Jiro TAKANO††

Sougou Kankyou Bunseki Co., Ltd.; 1-13-2 Kamoi, Midori-ku, Yokohama-shi 226-0003 Japan
Department of Resources and Environmental Science, School of Humanities and Culture, Tokai University; 1117 Kitakaname, Hiratsuka-shi 259-1292 Japan
†† Department of Chemistry, School of Science, Tokai University; 1117 Kitakaname, Hiratsuka-shi 259-1292 Japan

A disk-format solid phase extraction method for the determination of the pesticides, by gas chromatography/mass spectrometry (GC/MS) with electron ionization (EI) is described. This method provides good linearity of the calibration curve and repeatability. The correlation coefficients of calibration curve were estimated to be from 0.981 to 0.999 for these pesticides in the concentration range from 0.2 mg/L to 2 mg/L. These compounds were adsorbed on a disk-format solid phase from river water and rain water. A capital acetone and hexane was investigated as solvents for elution of these compounds adsorbed on the solid phase. As a result, a capital acetone and hexane turned out to be very effective and a high recovery (about 100%) was obtained for these pesticides in distilled water. This method was successfully applied to analyze the pesticides in river water and rain water.

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