Insecticides and herbicides in soils 67
Table 3.2 Gas chromatographic methods for determination of chlorinated insecticides in soil extracts.
Organochlorine
insecticides
Extraction solvent
Comments
References
Miscellaneous
Comparison of
Need efficient clean-up
12
different extraction
procedures
17
solvents
DDT, dieldrin
Hexane-isopropanol,
Comparison of different
18
hexane-acetone
extraction solvents
hexane-isopropanol,
acetone
DDT, dieldrin,
Florisil column
19
endrin, methoxychlor
extraction
Dieldrin, endrin
–
Insecticides reacted with
20
Boron trichloride
prior to gas chromatography.
Limit of detection: 0.01 ppm
BHC isomers
Light petroleum
Comparison of GLC and
21
thin-layer chromatography
DDT
–
Gas liquid chromatography
22
with ECD
Miscellaneous
–
Gas liquid chromatography
23
Limit of detection: 0.0005 to
24
0.008 ppm
Miscellaneous
Acetone-Toluene (1:1)
Gas liquid chromatography
25
with
63 Ni detector
Kepone, DDT,
–
Study of DDT breakdown
25
permethrin
Miscellaneous
Acetone
Contribution of acetone
26
polymers to coextracted
material. Capillary gas
chromatography
Miscellaneous
Miscellaneous
Gas chromatography-mass
27
spectrometry
Gas chromatography-mass spectrometry
Dieldrin
Hexane
Resolution of chlorinated
28
Heptachlor
insecticides and PCB
Lindane
–
Application of gas
29
chromatography-mass
spectrometry. Limit of
detection 0.1 µg/kg
Miscellaneous
Miscellaneous
Gas chromatography ion trap
30
Tandem mass spectrometry
Organochlorine
Microwave assist extraction
31
Insecticides
electron capture detection
DDT
DDT-dihydro-chlorinase
41
used to convert DDT to DDE
which is then determined by glc
Source: Author’s own files.