Analytical Methods Archive

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The Environmental Monitoring Branch scientists select pesticides for analytical method development by researching criteria such as pesticide use patterns, physical-chemical properties, toxicity and previous detections. The Branch contracts with laboratories to develop these methods to analyze environmental samples and sampling media collected by our staff. Most of the following analytical methods were developed by the California Department of Food and Agriculture's Center for Analytical Chemistry. As part of their quality assurance program, the Center adheres to the U.S. Environmental Protection Agency's system for environmental quality and technology, and the International Standards Organization's ISO-17025 standard. Consistent with these standards, the following analytical methods are designated as "uncontrolled" because more recent versions may have been developed but not posted on this page. Original, "controlled" copies of methods are stored by the contract laboratories.

• "Unequivocal Detection" criteria memo, PDF (42 kb) (Aggarwal, 2012).

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2010

• EMON-SM-05-020, PDF (144 kb). Determination of Chlorothalonil in Ground and Surface Water (CDFA, 2010).
  • "Unequivocal Detection" criteria memo, PDF (40 kb) (Aggarwal, 2011).
• EMON-SM-05-019, PDF (106 kb). Determination of Acrolein, Iodomethane, Carbon Disulfide, ci-1,3 Dichloropropene, trans-1,3-Dichloropropene, MIBK and Bromomethane in Air Samples Collected in Summa Canisters (CDFA, 2010).
• EMON-SM-05-018, PDF (162 kb). Determination of Azoxystrobin, Azoxystrobin Acid, Azoxystrobin Z-metabolite, Dicloran, Iprodione, Isoiprodione, Vinclozalin and 3,5- Dichloroaniline in Well Water (CDFA, 2010).
  • "Unequivocal Detection" criteria memo, PDF (40 kb) (Aggarwal, 2011).
• EMON-SM-EMON-SM-05-020, PDF (). Determination of Chlorothalonil in Ground and Surface Water (CDFA, 2010) (PDF, 144 KB)
  • "Unequivocal Detection" criteria memo (Aggarwal, 2011) (PDF, 40 kb)
• EMON-SM-05-014, PDF (104 kb). Determination of Iodomethane Desorbed from Charcoal Tubes (CDFA, 2010).
• EMON-SM-05-004, PDF (83 kb). Determination of Napropamide and Oryzalin in Ground Water by High Performance Liquid Chromatography with Ion Trap Mass Spectrometry (CDFA, Revised 2010).
  • "Unequivocal Detection" criteria memo, PDF (39 kb) (Aggarwal, 2011).

• OP-Water #6, PDF (39 kb). Determination of Organophosphorous Pesticides in Water Samples. (CDFG, 2004).
• PYR-Water #1, PDF (28 kb). Determination of Synthetic Pyrethroids in Water Samples. (CDFG, 2004).
• EMON-SM-59-6, PDF (553 kb). Determination of 1,3-Dichloropropene (Telone) and Methyl Isothiocyanate (MITC) Absorbed on Charcoal. (CDFA, 2004).
• EMON-SM 46-0, PDF (584 kb). Determination of Organophosphate Pesticides in Surface Water using Gas Chromatography. (revised 4/20/04 for 10 ppt RLs). (CDFA, 2004).
• EMON-SM-41.9, PDF (2.4 mb). Determination of MITC (Methyl Isothiocyanate) in Air by GC/NPD or GC/TSD. (CDFA, 2004).

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2003

• EMON-SM-52-7, PDF (502 kb). Determination of Pyrethroids in Sediment Water. (CDFA, 2003).
• EMON-SM-52.6, PDF (507 kb). Determination of Pyrethroids in Sediment. (CDFA, 2003).

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2002

• EM 38.0, PDF (966 kb). Determination of Residues of Alachlor and Metolachlor and Selected Metabolites in Surface Water by Liquid Chromatography-Mass Spectrometry. (CDFA, 2002).
• EM 29.7, PDF (683 kb). Determination of DACT, ACET, Bromacil, Simazine, Hexazinone, Diuron, Atrazine, and Norflurazon in Soil by Liquid Chromatography- Mass Spectrometry. (CDFA, 2002).
• EM 12.7, PDF (283 kb). HPLC Determination of Total Imidacloprid in Vegetation. (CDFA, 2002).
• Method 246, PDF(483 kb). Determination of Organophosphate Pesticidess in Surface Water Using Gas Chromatography. (PTRL, 2002).
• Method 245, PDF (232 kb). Determination of Atrazine, Bromacil, Diuron, Hexazinone, Norflurazon, Prometon, Simazine, Deethyl Atrazine (DEA), Deisopropyl Atrazine (ACET), and Diamino Chlorotriazine (DACT) in Well Water by Liquid Chromatography- Atmospheric Pressure Chemical Ionization Mass Spectrometry. (PTRL, 2002).
  • "Unequivocal Detection" criteria memo, PDF (52 kb) (Spurlock, 2002).
• Method 51.1, PDF (103 kb). Determination of Methyl Parathion and its Oxygen Analog (OA) in Air on XAD-4 Resin. (CDFA, 2002).

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2001

• Method 16, PDF (252 kb). GC Determination of Cyfluthrin in Surface Water. (CDFA, 2001).
• Method 234, PDF (1.7 mb). Determination of Atrazine, Bromacil, Cyanazine, Diuron, Hexazinone, Metribuzin, Norflurazon, Prometon, Prometryn, Simazine, Deethyl Atrazine (DEA), Deisopropyl Atrazine (ACET), and Diamino Chlorotriazine (DACT) in Well Water and River Water by Liquid Chromatography- Atmospheric Pressure Chemical Ionization Mass Spectrometry. (CDFA, 2001) replaced by method 303.
• EM 55.8, PDF (260 kb). Determination of Propanil in Surface Water using Liquid Chromatography with Ultra Violet Detector and Positive Ion Electrospray Ionization Mass Spectrometry. (CDFA, 2001).
• EM 50.6, PDF (184 kb). Oryzalin in Surface Water. (CDFA, 2001).
• EM 37.6, PDF (632 kb). Determination of Residues of Alachlor and Metolachlor and Selected Metabolites in Well Water by Liquid Chromatography-Mass Spectrometry. (CDFA, 2001).
  • "Unequivocal Detection" criteria memo, PDF (178 kb) (Spurlock, 2001).
• EM 33.5, PDF (298 kb). HPLC Determination of Imidacloprid in Surface and Well Water. (CDFA, 2001).
• EM 32.3, PDF (266 kb). Determination of Fenamiphos, Fenamiphos Sulfoxide, and Fenamiphos Sulfone in Well Water by Liquid Chromatography- Atmospheric Pressure Chemical Ionization Mass Spectrometry. (CDFA, 2001).

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2000

• Method 45.9, PDF (92 kb). Determination of Selected Organophosphate Pesticides in Air on XAD-4 Resin. (CDFA, 2000).
• Method 251, PDF (325 kb). Protocol for Analysis of Lompoc Air Samples. (UC Davis, 2000).
• Method 7, PDF (246 kb). Determination of Bifenthrin in Water by GC/ECD. (CDFA, 2000).
• OP-SED #0, PDF (116 kb). Analysis of Organophosphate Pesticides in Sediment. (CDFG, 2000).
• EM 61.5, PDF (365 kb). The Determination of Triclopyr and 2,4-D in Plant Materials. (CDFA, 2000).
• EM 52.5, PDF (443 kb). Determination of Permethrin and Esfenvalerate/Fenvalerate in Sediment Water. (CDFA, 2000).
• EM 32.1, PDF (360 kb). Fenoxycarb, Pyriproxyfen and Hydramethylnon in Water. (CDFA, 2000).
• EM 29.6, PDF (196 kb). Determination of Hexazinone and Diuron in Sediment by LC/MS. (CDFA, 2000).
• EM 29.5, PDF (230 kb). Determination of Hexazinone and Diuron in Alfalfa by LC/MS. (CDFA, 2000).
• EM 29.4, PDF (400 kb). Determination of Hexazinone and Diuron in Soil by Liquid Chromatography-Mass Spectrometry. (CDFA, 2000).
• EM 29-3, PDF (459 kb). Determination of Diuron and Hexazinone on Kimbies using Liquid Chromatography/Mass Spectrometry. (CDFA, 2000).
• EM 12.5, PDF (326 kb). Determination of Carbaryl and Methidathion in Selected Fruits and Vegetables Using Liquid Chromatography. (CDFA, 2000).
• EM 12.4, PDF (292 kb). Determination of Carbaryl and Imidacloprid in on Dislodgeable Leaf Punch Samples. (CDFA, 2000).
• EM 12.3, PDF (316 kb). Determination of Carbaryl and Imidacloprid Desorbed from XAD-2 Resin Tubes. (CDFA, 2000).

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2011

• EMON-SM-05-025 (143), PDF (291 kb). Determination of Linuron, Isoxaben, Mefenoxam, Methomyl and Propyzamide in Well Water by Ultra Performance Liquid Chromatography Coupled to Tandem Mass Spectrometry (CDFA, 2011).
  • "Unequivocal Detection" criteria memo, PDF (42 kb) (Aggarwal, 2012).

2004

• EMON-SM-41.9, PDF (2.4 mb). Determination of MITC (Methyl Isothiocyanate) in Air by GC/NPD or GC/TSD. (CDFA, 2004).

1999

• EM 16, PDF (201 kb). Determination of Chloropicrin Desorbed from XAD-4 Resin Tubes (CDFA 1999).