Organic Chemistry Research Core Technology Team
Bumble bees being prepped for pesticide residue analysis.
Vial containing an egg sample that will undergo chemical extraction
A U.S. Geological Survey chemist evaporating sample extracts
Gas chromatograph-mass spectrometer
U.S. Geological Survey chemist homogenizes a tissue sample
About the Research
The Organic Chemistry Research Laboratory Core Technology Team (CTT) as part of the Environmental Health Program focuses on the identification and quantitation of trace level organic contaminants (with a special focus on pesticides) in a wide array of environmental media (water, sediment/soil, plants, biota, etc.).
The Organic Chemistry Research Laboratory CTT develops targeted analytical methods for the quantitation of chemicals that can impact the health of organisms and humans.
This work focuses on contaminants and emerging issues including pesticides, other agrochemicals (nitrification inhibitors, herbicide safeners), disinfection by-products, quaternary ammonium compounds (QACs), and multiple other anthropogenic chemicals and their transformation products.
Key Instrumentation
- Two gas chromatograph single quadrupole mass spectrometers for chemical quantitation (water, sediment, tissue)
- Gas chromatograph triple quadrupole mass spectrometer for chemical quantitation (tissue and sediments)
- Liquid chromatograph triple quadrupole mass spectrometer for chemical quantitation (water, sediment, tissue)
- Liquid chromatograph high resolution mass spectrometer for chemical quantitation and identification
- Extraction equipment for working with a variety of sample matrices
Key Analytical Capabilities
- Pesticides and pesticide degradates
- Custom method/matrix development
- Ability to measure environmentally relevant concentrations in small sample volumes.

Science Team Collaborators
-
Food Resources Lifecycle Integrated Science Team
The team studies the movement of toxicants and pathogens that could originate from the growing, raising, and processing/manufacturing of plant and animal products through the environment where exposure can occur. This information is used to understand if there are adverse effects upon exposure and to develop decision tools to protect health.Drinking Water and Wastewater Infrastructure Science Team
The team studies toxicants and pathogens in water resources from their sources, through watersheds, aquifers, and infrastructure to human and wildlife exposures. That information is used to develop decision tools that protect human and wildlife health.Energy Resources Life Cycle Integrated Science Team
The Energy Resources Life Cycle Integrated Science Team focuses on the potential for environmental contaminant exposures that might originate from energy resource activities including extraction, production, transportation, storage, waste management, and restoration. Perceived health risks to humans and other organisms will be distinguished from actual risks, if any. If actual risks are identified...
Science activities related to the Organic Chemistry Research Core Technology Team can be found below.
Data related to the Organic Chemistry Research Core Technology Team can be found below.
Pesticide Concentrations in American Bullfrog (Lithobates catesbeianus) Tadpoles Collected from Ponds and Reservoirs near Mead, Nebraska
Target-Chemical Concentrations and Microbiological Results for Assessment of Mixed Contaminant and Biological Exposures in Bottled Water, 2020
Pesticide residues in passive samplers and bee tissue from Conservation Reserve Program fields across an agricultural gradient in eastern Iowa, USA, 2019 (ver 2.0, October 2023)
Pesticide concentrations in bees and other matrices collected from sunflower fields (with and without a neonicotinoid seed treatment) near Sacramento, California
Naled and dichlorvos in water and aquatic organisms from a canal and rice fields near Sacramento, California
Water-quality results from a wastewater reuse study: Inorganic and organic compositions of wastewater effluent and select urban and agricultural water types during rain-induced runoff, Chickasha, Oklahoma, 2018-2019
Multimedia items related to the Organic Chemistry Research Core Technology Team can be found below.
Scientific publications related to the Organic Chemistry Research Core Technology Team can be found below.
Prevalence of neonicotinoid insecticides in paired private-well tap water and human urine samples in a region of intense agriculture overlying vulnerable aquifers in eastern Iowa
Juxtaposition of intensive agriculture, vulnerable aquifers, and mixed chemical/microbial exposures in private-well tapwater in northeast Iowa
Contaminant exposure and transport from three potential reuse waters within a single watershed
Wild bee exposure to pesticides in conservation grasslands increases along an agricultural gradient: A tale of two sample types
Bottled water contaminant exposures and potential human effects
Tapwater exposures, effects potential, and residential risk management in Northern Plains Nations
About the Research
The Organic Chemistry Research Laboratory Core Technology Team (CTT) as part of the Environmental Health Program focuses on the identification and quantitation of trace level organic contaminants (with a special focus on pesticides) in a wide array of environmental media (water, sediment/soil, plants, biota, etc.).
The Organic Chemistry Research Laboratory CTT develops targeted analytical methods for the quantitation of chemicals that can impact the health of organisms and humans.
This work focuses on contaminants and emerging issues including pesticides, other agrochemicals (nitrification inhibitors, herbicide safeners), disinfection by-products, quaternary ammonium compounds (QACs), and multiple other anthropogenic chemicals and their transformation products.
Key Instrumentation
- Two gas chromatograph single quadrupole mass spectrometers for chemical quantitation (water, sediment, tissue)
- Gas chromatograph triple quadrupole mass spectrometer for chemical quantitation (tissue and sediments)
- Liquid chromatograph triple quadrupole mass spectrometer for chemical quantitation (water, sediment, tissue)
- Liquid chromatograph high resolution mass spectrometer for chemical quantitation and identification
- Extraction equipment for working with a variety of sample matrices
Key Analytical Capabilities
- Pesticides and pesticide degradates
- Custom method/matrix development
- Ability to measure environmentally relevant concentrations in small sample volumes.

Science Team Collaborators
-
Food Resources Lifecycle Integrated Science Team
The team studies the movement of toxicants and pathogens that could originate from the growing, raising, and processing/manufacturing of plant and animal products through the environment where exposure can occur. This information is used to understand if there are adverse effects upon exposure and to develop decision tools to protect health.Drinking Water and Wastewater Infrastructure Science Team
The team studies toxicants and pathogens in water resources from their sources, through watersheds, aquifers, and infrastructure to human and wildlife exposures. That information is used to develop decision tools that protect human and wildlife health.Energy Resources Life Cycle Integrated Science Team
The Energy Resources Life Cycle Integrated Science Team focuses on the potential for environmental contaminant exposures that might originate from energy resource activities including extraction, production, transportation, storage, waste management, and restoration. Perceived health risks to humans and other organisms will be distinguished from actual risks, if any. If actual risks are identified...
Science activities related to the Organic Chemistry Research Core Technology Team can be found below.
Data related to the Organic Chemistry Research Core Technology Team can be found below.
Pesticide Concentrations in American Bullfrog (Lithobates catesbeianus) Tadpoles Collected from Ponds and Reservoirs near Mead, Nebraska
Target-Chemical Concentrations and Microbiological Results for Assessment of Mixed Contaminant and Biological Exposures in Bottled Water, 2020
Pesticide residues in passive samplers and bee tissue from Conservation Reserve Program fields across an agricultural gradient in eastern Iowa, USA, 2019 (ver 2.0, October 2023)
Pesticide concentrations in bees and other matrices collected from sunflower fields (with and without a neonicotinoid seed treatment) near Sacramento, California
Naled and dichlorvos in water and aquatic organisms from a canal and rice fields near Sacramento, California
Water-quality results from a wastewater reuse study: Inorganic and organic compositions of wastewater effluent and select urban and agricultural water types during rain-induced runoff, Chickasha, Oklahoma, 2018-2019
Multimedia items related to the Organic Chemistry Research Core Technology Team can be found below.
Scientific publications related to the Organic Chemistry Research Core Technology Team can be found below.