Analytical Methods

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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.

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   Reports and Memos

2017

  • EM 5.5, PDF (218 kb). Determination of Bentazon in Ground Water using Gas Chromatography/MSD (CDFA, 2015).
    • "Unequivocal Detection" criteria memo, PDF (41 kb) (Aggarwal, 2017).

2016

  • EMON-38.0 Modified, PDF (1.3 mb). Analysis of S-Metolachlor, Metolachlor ESA, and Metolachlor OXA in Well Water (CDFA, 2015).
    • "Unequivocal Detection" criteria memo, PDF (41 kb) (Aggarwal, 2016).
  • EMON-SM-05-032, PDF (398 kb). Determination of 44 Pesticides on Well Water by Liquid Chromatography Coupled to Linear Ion Trap Quadrupole and Gas Chromatography Coupled to Triple Quadrupole Mass Spectrometer (CDFA, 2013).
    • "Unequivocal Detection" criteria memo, PDF (46 kb) (Aggarwal, 2016).

2015

  • WPCL-MS-67, PDF (404 kb). Determination of Pyrethroid Pesticides in Sediment (CDFW, 2009).
  • WPCL-PR-007, PDF (245 kb). Extraction of Organochlorine, Organophosphorus, PCBs and Pyrethroids Pesticides in Water Samples. (CDFW, 2014).
  • WPCL-PR-008, PDF (376 kb). Extraction of Tissues and Sediments for Pyrethroid Pesticides (Pressurized Fluid Extraction). (CDFW, 2013).
  • Analytical Methods, PDF (58 kb) Pesticide Analytical Methods for Surface Water and Sediment Submitted by Registrants

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2014

  • EMON-SM-05-033, PDF (243 kb). Determination of Chlorfenapyr in Surface Water Using Triple Quadrupole GC/MS/MS. (Funded by US EPA Performance Partnership Grant). 2014.

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2013

  • EMON-SM-46-0-MSD, PDF (290 kb). Determination of Organophosphate Pesticides in Surface Water Using Gas Chromatography with Mass Selective Detection (MSD). (CDFW, 2013).
  • WPCL-LC-009, PDF (312 kb). Determination of Selected Rice Herbicides in Ground Water by (SPE) and LC/MSMS (CDFW, 2013).
    • "Unequivocal Detection" criteria memo, PDF (55 kb) (Aggarwal, 2013).
  • EMON-SM-05-031, PDF (217 kb). Determination of Chlorantraniliprole in Surface Water by Liquid Chromatography Coupled to Linear Ion Trap Quadrupole (Funded by US EPA Consolidated Cooperative Agreement)
  • EMON-SM-05-025, PDF (291 kb). Determination of Linuron, Isoxaben, Mefenoxam, Metalaxyl, Methomyl and Propyzamide in Well Water by Ultra Performance Liquid Chromatography Coupled to Tandem Mass Spectrometry (CDFA, 2013).
    • "Unequivocal Detection" criteria memo, PDF (42 kb) (Aggarwal, 2012).

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2012

  • WPCL-AA-041 CDPR, PDF (134 kb). Iodide Anion by Ion Chromatography, EPA Method 300 (CDFG, 2012).
  • MPSL-ICPMS-I2, PDF (51 kb). Iodine by ICP/MS (CDFG, 2012).
  • EMON-SM-05-0021, PDF (776 kb). Determination of Selected Pesticides Collected on XAD-4 Resin by Ultra Performance Liquid Chromatography Mass Spectrometry and Gas Chromatography Mass Spectrometry.

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2011

  • EM 16, PDF (199 kb). Determination of Chloropicrin Desorbed from XAD-4 Resin Tubes (CDFA 2011).
  • EMON-SM-41.9, PDF (133 kb). Determination of MITC in Air By GC/NPD or GC/TSD (CDFA 2011)
  • EMON-SM-05-022, PDF (168 kb). Determination of Pyrethroids in Sediment Water Using Triple Quadrupole GC/MS/MS (CDFA 2011).
  • EMON-SM-05-023, PDF (146 kb) Determination of Bensulide and Imidacloprid in Surface Water (CDFA, 2011)
  • EMON-SM-05-027, PDF (189 kb). Determination of Thiram in Surface Water (CDFA 2011).
  • EMON-SM-05-026, PDF (119 kb). Determination of Methoxyfenozide and Tebufenozide in Surface Water by Ultra Performance Liquid Chromatography Coupled to Tandem Mass Spectrometry (CDFA 2011).
  • EMON-SM-05-024, PDF (268 kb). Determination of Azoxystrobin, Kresoxim methyl, Pyraclostrobin and Trifloxystrobin in Surface Water by Ultra Performance Liquid Chromatography Coupled to Tandem Mass Spectrometry (partially funded by US EPA Cooperative Agreement)
  • EMON-SM 11.3, PDF (85 kb). Determination of N- methylcarbamate Pesticides in Surface Water using High Performance Liquid Chromatography and Post-column Derivatization (CDFA, Revised 2011).

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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-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).

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2009

  • EMON-SM-05-016, PDF (69 kb). Determination of Bensulide in Surface Water Using Liquid Chromatography-Mass Spectrometry (CDFA, 2009).
  • EMON-SM-05-015, PDF (122 kb). Analysis of Chlorpyrifos in Sediment (CDFA, 2009).
  • EMON-SM-05-017, PDF (58 kb). Determination of MeBr in Air by GC/ECD (CDFA, 2009).
  • EMON-SM 11.3, PDF (83 kb). Determination of N-methylcarbamate Pesticides in Surface Water using High Performance Liquid Chromatography and Post-column Derivatization (CDFA, 2009).
  • EMON-SM-62.9, PDF (93 kb). Determination of Atrazine, Bromacil, Cyanazine, Diuron, Hexazinone, Metribuzin, Norflurazon, Prometon, Prometryn, Simazine, Deethyl Atrazine (DEA), Deisopropyl Atrazine ( ACET), Diamino Chlorotraizine (DACT), Tebuthiuron and the metabolites Tebuthiuron-104, Tebuthiuron-106, Tebuthiuron-107 and Tebuthiuron-108 in Well Water and River Water By Liquid Chromatography- Atmospheric Pressure Chemical Ionization Mass Spectrometry (CDFA, Revised 2009).
    • "Unequivocal Detection" criteria memo, PDF (48 kb) (Fattah, 2008).

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2008

  • EMON-SM 05-013, PDF (106 kb). Determination of Fipronil and Metabolites in Surface Water using Gas Chromatography/Mass spectrometry. (CDFA, 2008).
  • EMON-SM 05-012, PDF (111 kb). Determination of Phenoxy Herbicides in Surface water using Gas Chromatography/MSD. (CDFA, 2008).
  • EMON-SM-05-009, PDF (122 kb). Determination of Pheromones in Air Trapped on XAD-4 by Gas Chromatography-Mass Spectrometry (CDFA, 2008).
  • EM-SM-05-010, PDF (105 kb). Determination of Acephate and Methamidophos in Surface Water by LC-MS. (CDFA, 2008).
  • EMON-SM-05-002, PDF (498 kb). Determination of Selected Pesticides Collected on XAD-4 Resin by High Performance Liquid Chromatography Ion Trap Mass Spectrometry and Gas Chromatography Mass Spectrometry. (CDFA, 2008).
  • EMON-SM-13.0, PDF (137 kb). Determination of Imidacloprid and the Olefinic Imidacloprid, Guanidine, Olefinic Guanidine, Urea Metabolites in Well Water by High Performance Liquid Chromatography Tandem Mass Spectrometry. (CDFA, 2008).
    • "Unequivocal Detection” criteria memo, PDF (48 kb) (Fattah, 2008).
  • Method 309, PDF (498 kb). Determination of Selected Pesticides Collected on XAD-4 Resin by High Performance Liquid Chromatography Ion Trap Mass Spectrometry and Gas Chromatography Mass Spectrometry. (CDFA, 2008).

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2007

  • EMON-SM 05-006, PDF (245 kb). Determination of Ethalfluralin, Trifluralin, Benfluralin, Prodiamine, Pendimethalin, Oxyfluorfen, and Oryzalin in Surface Water. (CDFA, 2007).
  • EM-SM-05-005, PDF (149 kb). Determination of Tebuthiuron and its Metabolites 104, 106, 107, and 108 in Well Water by Liquid Chromatography- Atmospheric Pressure Chemical Ionization Mass Spectrometry. (CDFA, 2007).
    • "Unequivocal Detection" criteria memo, PDF (52 kb) (Fattah, 2008).
  • WPCL 53, PDF (62 kb). Determination of Synthetic Pyrethroids in Water Samples. (CDFG, 2007).
  • WPCL 52, PDF (702 kb). Determination of Organophosphorous Pesticides in Water Samples. (CDFG, 2007).

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2006

  • ELAB-SM-01, PDF (2.86 mb). Determination of Thiram in Surface Water. (CDFA, 2006).
  • Carb-Water #2, PDF (34 kb). Determination of Carbamate Pesticides in Water Samples. (CDFG, 2006).
  • Method 298, PDF (98 kb). CDFG Fish and Wildlife Water Pollution Control Laboratory Standard Operating Procedure for the Determination of Inorganic Anions in Water by Ion Chromatography- EPA 300.00. (CDFG, 2006).
  • EMON-SM 05-003, PDF (206 kb). Analysis of Pyrethroids in Sediment Water. (CDFA, 2006).

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2005

  • EMON-SM-05-001, PDF (89 kb). Determination of Molinate, EPTC, Vernolate, Pebulate, Cycloate, Thiobencarb, Butylate and TriallateThiocarbamates in Ground Water by High Performance Liquid Chromatography with Tandem Mass Spectrometry (CDFA, 2005).
  • EMON-SM 52-9, PDF (400 kb). Analysis of Pyrethroids in Sediment. (CDFA, 2005).
  • OP-SED #2, PDF (77 kb). Determination of Select Organophosphorous Pesticides in Sediment Samples. (CDFG, 2005).
  • PYR-SED #0, PDF (50 kb). Determination of Pyrethroid Pesticides in Sediment. (CDFG, 2005).

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2004

  • 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).

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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 Pesticides 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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1999

  • EM 62.9, PDF (127 kb). Determination of Atrazine, Bromacil, Cyanazine, Diuron, Hexazinone, Metribuzin, Norflurazon, Prometon, Prometryn, Simazine, Deethyl Atrazine (DEA), Deisopropyl Atrazine (ACET), and Diamino Chlorotraizine (DACT) in Well Water and River Water By Liquid Chromatography- Atmospheric Pressure Chemical Ionization Mass Spectrometry (CDFA, 1999).

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