Method CDFA OCl Pesticides

Organochlorine Pesticides in Food by California Department of Food and Agriculture (CDFA) Screening Method


Organochlorine pesticides are extracted from the food into acetonitrile.  The extract is solvent exchanged, processed through clean-up and analyzed by GC/ECD (electron capture detector).  All positive detects are confirmed on a second column.


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Method Data

Hold Times, Preservatives, Preps, Collection, Analytical & Documentation
Holding Time:   None specified in method.
Preservatives:   None specified in method.
Required Preps:   None
Collection Method:   Grab sampling
Analytical Methodology:   GC/ECD
Documentation:  

Analyte List*

Analyte Formula CAS Number Detection Limit
Heptachlor epoxide
C10H5Cl7O
1024-57-3
0.02
 ppm
Endosulfan sulfate
C9H6Cl6O4S
1031-07-8
0.01
 ppm
Dicofol (Kelthane)
115-32-2
0.05
 ppm
Dichlone
C10H4Cl2O2
117-80-6
0.05
 ppm
Dichlobenil (2,6-Dichlorobenzoic acid nitrile)
C7H3Cl2N
1194-65-6
0.03
 ppm
Captan
C9H8Cl3NO2S
133-06-2
0.02
 ppm
Folpet
C9H4Cl3NO2S
133-07-3
0.03
 ppm
Polychlorinated Biphenyls
1336-36-3
0.25
 ppm
Trifluralin
C13H16F3N3O4
1582-09-8
0.02
 ppm
Alachlor (Lasso)
C14H20ClNO2
15972-60-8
0.02
 ppm
2,3,5,6-Tetrachloro-1,4-benzenedicarboxylic acid dimethyl ester (Dacthal)
C10H6Cl4O4
1861-32-1
0.02
 ppm
Benfluralin (Balan, Benefin)
C13H16F3N3O4
1861-40-1
0.02
 ppm
Chlorothalonil (Bravo)
C8Cl4N2
1897-45-6
0.01
 ppm
Oxadiazon (Ronstar)
C15H18Cl2N2O3
19666-30-9
0.05
 ppm
Metribuzin (Sencor)
C8H14N4OS
21087-64-9
0.02
 ppm
Cyanazine
C9H13ClN6
21725-46-2
0.1
 ppm
Mirex
C10Cl12
2385-85-5
0.02
 ppm
Pronamide (Kerb, Propyzamide)
C12H11Cl2NO
23950-58-5
0.05
 ppm
Profluralin (Tolban)
C14H16F3N3O4
26399-36-0
0.02
 ppm
Captafol
C10H9Cl4NO2S
2939-80-2
0.04
 ppm
Aldrin
C12H8Cl6
309-00-2
0.01
 ppm
Bromacil
C9H13BrN2O2
314-40-9
0.04
 ppm
alpha-BHC
C6H6Cl6
319-84-6
0.01
 ppm
beta-BHC
C6H6Cl6
319-85-7
0.01
 ppm
delta-BHC
C6H6Cl6
319-86-8
0.01
 ppm
Linuron
C9H10Cl2N2O2
330-55-2
0.02
 ppm
Endosulfan II
C9H6Cl6O3S
33213-65-9
0.01
 ppm
Pendimethalin (Prowl)
C13H19N3O4
40487-42-1
0.05
 ppm
Bifenox (Modown)
C14H9Cl2NO5
42576-02-3
0.05
 ppm
Triadimefon (Bayleton)
C14H16ClN3O2
43121-43-3
0.02
 ppm
4,4'-DDT
C14H9Cl5
50-29-3
0.02
 ppm
Vinclozolin (Ronilan)
C12H9Cl2NO3
50471-44-8
0.02
 ppm
Chlorobenzilate (Acaraben)
C16H14Cl2O3
510-15-6
0.4
 ppm
Chlordane
C10H6Cl8
57-74-9
0.25
 ppm
gamma-BHC (Lindane)
C6H6Cl6
58-89-9
0.01
 ppm
Dieldrin
C12H8Cl6O
60-57-1
0.01
 ppm
Hexachlorocyclohexane (BHC, Benzahex)
608-73-1
0.01
 ppm
Propanil
C9H9Cl2NO
709-98-8
0.05
 ppm
Endrin
C12H8Cl6O
72-20-8
0.01
 ppm
Methoxychlor
C16H15Cl3O2
72-43-5
0.05
 ppm
4,4'-DDD
C14H10Cl4
72-54-8
0.02
 ppm
4,4'-DDE
C14H8Cl4
72-55-9
0.02
 ppm
Heptachlor
C10H5Cl7
76-44-8
0.01
 ppm
Toxaphene
C10H10Cl8
8001-35-2
0.25
 ppm
Pentachloronitrobenzene
C6Cl5NO2
82-68-8
0.02
 ppm
Endosulfan I
C9H6Cl6O3S
959-98-8
0.01
 ppm
Dichloran (Botran)
C6H4Cl2N2O2
99-30-9
0.02
 ppm
Alert (Chlorfenapyr)
122453-73-0
0.04
 ppm
Boscalid (Nicobifen)
188425-85-6
0.02
 ppm
Ethalfluralin (Sonalan)
55283-68-6
0.03
 ppm
Fenhexamid
126833-17-8
0.03
 ppm
Indoxacarb
173584-44-6
0.03
 ppm
Iprodione (Rovral)
36734-19-7
0.05
 ppm
Myclobutanil (Rally)
88671-89-0
0.05
 ppm
Oxyflourfen (Goal)
42874-03-3
0.04
 ppm
Pentachloroaniline
527-20-8
0.01
 ppm
Perthane (Ethylan)
72-56-0
0.1
 ppm
Procymidone
32809-16-8
0.02
 ppm
Tetradifon (Tedion)
116-29-0
0.02
 ppm
Trifloxystrobin
141517-21-7
0.03
 ppm
Triflumizole
68694-11-1
0.05
 ppm
Vegadex (Diethyldithiocarbamic acid)
95-06-7
0.05
 ppm

* The analytes and detection limits listed for each method represent the typical detection limits and analytes reported for that particular method. Keep in mind that analyte lists may vary from laboratory to laboratory. Detection limits may also vary from lab to lab and are dependent upon the sample size, matrix, and any interferences that may be present in the sample.