Trace analysis of pesticide residues in water by high-speed narrow-bore capillary gas chromatography-mass spectrometry with programmable temperature vaporizer.
A method for the rapid trace analysis of 17 residual pesticides in water by narrow-bore capillary (I.D. 100 microm) gas chromatography-mass spectrometry (GC-MS) using a programmable temperature vaporizer (PTV) was discussed. The method consisted of a large-volume injection (40 microl) by a PTV, high-speed 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 narrow-bore capillary column because the injected solvent volume could be reduced to less than 2 microl. The analysis time was 8.5 min [less than 50% of the analysis time using conventional columns (I.D. 250 microm)]. A 10-ml volume of river water was extracted by dichloromethane (4 ml), and then the extract was condensed to 1 ml. This extract was analyzed. Mean recoveries for river water spiked at 100 pg/ml ranged from 83.4 to 96.7%. The limit of detections of the 17 pesticides ranged from 1 to 100 pg/ml.
Hada
M
M
Yokogawa Analytical Systems Inc., Osaka, Japan.
Takin
M
M
Yamagami
T
T
Daishima
S
S
Yamaguchi
K
K
D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D009330:Nebulizers and Vaporizers; D010573:Pesticide Residues / Q000032:analysis*; D011786:Quality Control; D015203:Reproducibility of Results; D013696:Temperature; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014881:Water Supply
D010573:Pesticide Residues; D014874:Water Pollutants, Chemical