Trace analysis of pesticide residues in water by high-speed narrow-bore capillary gas chromatography-mass spectrometry with programmable temperature vaporizer
M. Hada et al., Trace analysis of pesticide residues in water by high-speed narrow-bore capillary gas chromatography-mass spectrometry with programmable temperature vaporizer, J CHROMAT A, 874(1), 2000, pp. 81-90
A method for the rapid trace analysis of 17 residual pesticides in water by
narrow-bore capillary (I.D. 100 mu m) gas chromatography-mass spectrometry
(GC-MS) using a programmable temperature vaporizer (PTV) was discussed. Th
e method consisted of a large-volume injection (40 mu l) by a PTV, high-spe
ed analysis using a narrow-bore capillary column and MS detection. The PTV
with solvent vent mode was very useful for large-volume injection into a na
rrow-bore capillary column because the injected solvent volume could be red
uced to less than 2 mu l. The analysis time was 8.5 min [less than 50% of t
he analysis time using conventional columns (I.D. 250 mu m)]. A 10-ml volum
e of river water was extracted by dichloromethane (4 ml), and then the extr
act was condensed to 1 ml. This extract was analyzed. Mean recoveries for r
iver water spiked at 100 pg/ml ranged from 83.4 to 96.7%. The limit of dete
ctions of the 17 pesticides ranged from 1 to 100 pg/ml. (C) 2000 Elsevier S
cience B.V. All rights reserved.