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Photography
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Liquid Chromatography-High Resolution Mass Spectrometry (LC-HRMS).

Technical Memos

TM92-07 Change of Sample Type Requirement for Ion Chromatography Analysis

Technical Memos

TM00-06 Elimination of Orthophosphate and Nitrate Analysis by Ion Chromatography

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Methods of analysis—Determination of pesticides in filtered water and suspended sediment using liquid chromatography- and gas chromatography-tandem mass spectrometry

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Speciation of aryloxyethoxyethyl benzyl dimethyl ammonium salts by glass capillary gas chromatography and high-performance liquid chromatography

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Determination of chloroacetanilide herbicide metabolites in water using high-performance liquid chromatography-diode array detection and high-performance liquid chromatography/mass spectrometry

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Analysis of picric acid in water by high-performance liquid chromatography

Technical Memos

TM02-02 Revision of the Procedure Used to Calculate Concentrations of Chlorophyll a and b in Phytoplankton and Periphyton by High-Performance Liquid Chromatography

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Determination of chloride in geological samples by ion chromatography

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Kovats and lee retention indices determined by gas chromatography/mass spectrometry for organic compounds of environmental interest

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Determination of selected anions in water by ion chromatography

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Concentration and fractionation of hydrophobic organic acid constituents from natural waters by liquid chromatography

Technical Memos

TM02-01 Removal of Terbuthylazine from Pesticide Analysis by Gas Chromatography/Mass Spectrometry (Methods 2001 abd 2010)

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Liquid chromatography of hydrocarbonaeous quaternary amines on cyclodextrin bonded silica

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Determination of tetraalkyllead compounds in gasoline by liquid chromatography-atomic absorption spectrometry

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Linker-assisted immunoassay and liquid chromatography/mass spectrometry for the analysis of glyphosate

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Semiquantitative determination of polychlorinated biphenyls in tissue samples by thin layer chromatography

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Classification of lung cancer patients and controls by chromatography of modified nucleosides in serum

Data Release
Collage of images of an earthquake, scientists in flood with instruments, a volcano erupting, and seismic illustration.

Screening geochemistry, gas chromatography, and solid bitumen reflectance data in the Bakken petroleum system, Williston Basin, USA

Data Release
Collage of images of an earthquake, scientists in flood with instruments, a volcano erupting, and seismic illustration.

Daily operating standard data used for verification of the Petroleum Geochemistry Research Laboratory Method for Qualitative Biomarker Analysis of Crude Oil and Rock Extracts by Gas Chromatography-Single Quadrupole Mass Spectrometry

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Analysis of antimycin A by reversed-phase liquid chromatography/nuclear magnetic-resonance spectrometry

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High-performance liquid chromatography of quinoidal imminium compounds derived from triphenylmethanes

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Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory; determination of chlorinated pesticides in aquatic tissue by capillary-column gas chromatography with electron-capture detection

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Method for the determination of dissolved chloride, nitrate, and sulfate in natural water using ion chromatography

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Comparison of gas chromatography/mass spectrometry and immunoassay techniques on concentrations of atrazine in storm runoff

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The group separation of the rare-earth elements and yttrium from geologic materials by cation-exchange chromatography

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Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory-Determination of polycyclic aromatic hydrocarbon compounds in sediment by gas chromatography/mass spectrometry

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Development and Application of Pyrolysis Gas Chromatography/Mass Spectrometry for the Analysis of Bound Trinitrotoluene Residues in Soil

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Determination of pesticides and pesticide degradates in filtered water by direct aqueous-injection liquid chromatography-tandem mass spectrometry

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Determination of C6-C10 aromatic hydrocarbons in water by purge-and-trap capillary gas chromatography

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