OWQ Approval Memos for Water-Quality Analytical Methods
Numbering is for convenience of reference.
NWQL
30. - Approval of New USGS Methods: Determination of Heat Purgeable (Method O-4437-16) and Ambient Purgeable (Method O-4436-16) Volatile Organic Compounds in Water by Gas Chromatography/Mass Spectrometry [40KB PDF] with Tables [25KB XLSX]
29. - Approval of New USGS Method (O-2437-15) Determination of Pesticides and Pesticide Degradates by Direct Aqueous Injection (DAI) LC-MS/MS [180KB PDF]
28. - Approval of New USGS Method (O-2440-14) for Human-Use Pharmaceuticals and Related Compounds in Filtered Water by Direct Aqueous Injection -- High Performance Liquid Chromatography with Tandem Mass Spectrometry [255MB PDF]
27. - Approval of Methods of Analysis — Determination of Pesticides in Sediment Using Gas Chromatography/Mass Spectrometry (USGS Method Numbers O-6144-12 and O-7144-12) [80KB PDF]
26. - Approval of New USGS Methods for Steroid Hormones and Related Compounds in Filtered (Method O-2434-12) and Unfiltered (Method O-4434-12) Water by Solid-Phase Extraction, Derivatization, and Gas Chromatography with Tandem Mass Spectrometry [30KB PDF]
25. - Approval of new USGS Methods I-2547-11 and I-2548-11 for Standard- and Low-level Colorimetric Determination of Nitrate Plus Nitrite in Water by Enzymatic Reduction, Automated Discrete Analyzer Methods [85KB PDF]
24. - Determination of Terbufos, Phorate Insecticides and selected degradates in Filtered Water Using Gas Chromatography/Mass Spectrometry Method O-2435-10 [35KB PDF] (9/10/2010)
23. - Determination of Human-Health Pharmaceuticals in Filtered Water by Chemically Modified Styrene-Divinylbenzene Resin-Based SPE and HPLC/MS [25KB PDF] 2/01/2008)
22. - Determination of Wastewater Compounds in Whole Water by Continuous Liquid-Liquid Extraction and Capillary-Column GC/MS [35KB PDF] (6/28/2006)
Revised Aug. 7, 2006. The last sentence in the second paragraph was revised to read: "Initial method detection limits average 0.18 microgram per liter." (not milligram).
21. - Determination of Semivolatile Organic Compounds and PAHs in Solids by GC/MS [40KB PDF] (4/10/2006)
20. - Determination of Wastewater Indicators in Sediment [65KB PDF](2/2006)
19. - Determination of Elements in Natural Water, Biota, Sediment, and Soil Samples Using cICP/MS [20KB PDF] (11/3/2005, revised)
18. - Polynuclear Aromatic Hydrocarbons in Sediment [25KB PDF](11/2003)
17. - Determination of Organochlorine Pesticides and PCBs in Sediment and Suspended Sediment [20KB PDF] (10/2003)
16. - Determination of Nitrogen and Phosphorus in Whole and Filtered Water [20KB PDF] (7/2003)
15. - Determination of Organophosphate Pesticides in Whole Water [14KB PDF] and compounds in Schedule 1403 [25KB PDF] (5/2003)
14. - Determination of Gasoline Oxygenates, Degradates, and BTEX in Water [55KB PDF](11/2002)
13. - Supplement for the Determination of Fipronil and Degradates in Water [50KB PDF] (10/2002)
12. - Determination of Organophosphate Pesticides in Sediment [45KB PDF] (5/2002)
11. - Determination of Field and Laboratory Arsenic Speciation in Filtered Water [60KB PDF] (4/2002)
10. - Determination of Organophosphate Pesticides in Filtered Water [50KB PDF] (2/2002)
9. - Determination of Wastewater Compounds by the NWQL [60KB PDF] (6/2001)
8. - Determination of Mercury in Filtered and Unfiltered Water [50KB PDF] (4/2001)
7. - Determination of Polar Pesticides and Metabolites by the NWQL [50KB PDF] (4/2001)
6. - Determination of Moderate Use Pesticides and Degradates by the NWQL [50KB PDF] (3/2001)
5. - Determination of Ammonium Plus Organic Nitrogen by Kjeldahl Digestion and Automated Photometry [50KB PDF] (4/2000)
4. - Processing Taxonomy, and Quality Control of Benthic Macroinvertebrate Samples [50KB PDF] (4/2000)
3. - Determination of Dissolved Arsenic, Boron, Lithium, Selenium, Strontium, Thallium and Vandiu, Using ICP-MS [65KB PDF] (8/1999)
2. - Determination of Elements in Whole Water Digests Using ICP/MS [50KB PDF] (4/1999)
1. - Determination of Arsenic and Selenium in Water and Sediment [30KB PDF] (10/1998)
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Organic Chemistry Research Group, Lawrence, KS
10. - Approval of Method for the Analysis of Glyphosate, Aminomethylphosphonic acid, and Glufosinate, in Water by Isotope Dilution and Online Solid-Phase Extraction and Liquid Chromatography/Tandem Mass Spectrometry (USGS Method Number O-2141-09) [65KB PDF] (3/2010)
9. - Determination of Dissolved Isoxaflutole and Its Sequential Degradation Products, Diketonitrile and Benzoic Acid, in Water [15KB PDF] (3/2007)
8.- Determination of Acetamide Herbicides and Degradation Products in Water [20KB PDF] (5/2003)
7. - Determination of Triazine and Phenylurea Herbicides and Degradation Products in Water [50KB PDF] (12/2002)
6. - Determination of Geosmin and Methylisoborneol in Water [45KB PDF] (12/2002)
5. - Determination of Glyphosate, Aminomethylphosphoric Acid and Glufosinate in Water by LC/MS [55KB PDF] (12/2001)
4. - Approval of 4 Additional Chloroacetanilide Herbicide Degradation Compounds by LC/MS [50KB PDF] (2/2001)
3. - Approval of 13 Additional Herbicides and their Degradation Byproducts to Method 0-2132-99 [55KB PDF] (11/2000)
2. - Determination of Chloroacetanilide Herbicide Metabolites in Water Using High Performance LC/MA [70KB PDF] (5/2000)
1. - Determination of Triazine and Chloroacetanilide Herbicides in Water by SPE and CCGC/MS with Selected Ion Monitoring [75KB PDF] (8/1999)
Pesticide Fate Research Group, California Water Science Center
Approval of Method for the Determination of Pyrethroid Insecticides in Water and Sediment Using Gas Chromatography/Mass Spectrometry (USGS Method Numbers O-2143-09 for water and O-6143-09 for sediment) [25KB PDF] (7/2009)
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Wisconsin Water Science Center Mercury Laboratory
2. - Determination of Methylmercury in Solids and Suspended Solids [15KB PDF] (6/10/04)
1. - Determination of Methyl Mercury in Water [55KB PDF] (2/2002)
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