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Grace Armstrong is a Chemist with the M3 Research Laboratory and Upper Midwest Water Science Center.
USGS scientist, Grace Armstrong, training a scientist in Accra, Ghana on proper mercury sampling techniques as part of a U.S. State Department Embassy Fellowship Program.
USGS scientist, Grace Armstrong, training a scientist in Accra, Ghana on proper mercury sampling techniques as part of a U.S. State Department Embassy Fellowship Program.
Sampling location at the Kukuavile community along Ankobra River, Ghana highlighting the highly turbid water found near mining sites.
Sampling location at the Kukuavile community along Ankobra River, Ghana highlighting the highly turbid water found near mining sites.
Grated cassava root soaking in alum-processed river water, Kukuavile community along Ankobra River, Ghana.
Grated cassava root soaking in alum-processed river water, Kukuavile community along Ankobra River, Ghana.
USGS chemist Grace Armstrong is accessing Ankobra River sampling site with community consent and accompaniment.
USGS chemist Grace Armstrong is accessing Ankobra River sampling site with community consent and accompaniment.
USGS chemist Grace Armstrong collecting a sediment core for mercury analysis at the Kukuavile community along Ankobra River, Ghana.
USGS chemist Grace Armstrong collecting a sediment core for mercury analysis at the Kukuavile community along Ankobra River, Ghana.
Large volume surface water collections for mercury isotopes in Lake Erie on the US EPA research vessel Lake Explorer II.
Large volume surface water collections for mercury isotopes in Lake Erie on the US EPA research vessel Lake Explorer II.
Two scientists guide sampling equipment attached to large crane, on to deck of boat.
USGS is conducting sediment collection for metals and mercury analysis for Lake Erie, on the US EPA research vessel Lake Guardian.
Two scientists guide sampling equipment attached to large crane, on to deck of boat.
USGS is conducting sediment collection for metals and mercury analysis for Lake Erie, on the US EPA research vessel Lake Guardian.
USGS scientists collecting phytoplankton for mercury and per- and polyfluoroalkyl substances (PFAS) analyses in Saginaw Bay of Lake Huron.
USGS scientists collecting phytoplankton for mercury and per- and polyfluoroalkyl substances (PFAS) analyses in Saginaw Bay of Lake Huron.
Collection of water and phytoplankton for metals analysis in Lake Mendota, Wisconsin. M3 Research Lab researchers collect in two to five liter containers and then filter and size fractionate the samples at the lab process these samples back at the lab to determine the amount of mercury and metals entering the food web.
Collection of water and phytoplankton for metals analysis in Lake Mendota, Wisconsin. M3 Research Lab researchers collect in two to five liter containers and then filter and size fractionate the samples at the lab process these samples back at the lab to determine the amount of mercury and metals entering the food web.
USGS scientist Grace Armstrong is demonstrating how we collect plankton in lake waters, by towing the plankton net in Lake Mendota, Wisconsin.
USGS scientist Grace Armstrong is demonstrating how we collect plankton in lake waters, by towing the plankton net in Lake Mendota, Wisconsin.
USGS scientist Grace Armstrong sampling plankton on Lake Mendota in Madison, Wisconsin.
USGS scientist Grace Armstrong sampling plankton on Lake Mendota in Madison, Wisconsin.
USGS scientist, Grace Armstrong, training a scientist in Accra, Ghana on proper mercury sampling techniques as part of a U.S. State Department Embassy Fellowship Program.
USGS scientist, Grace Armstrong, training a scientist in Accra, Ghana on proper mercury sampling techniques as part of a U.S. State Department Embassy Fellowship Program.
Sampling location at the Kukuavile community along Ankobra River, Ghana highlighting the highly turbid water found near mining sites.
Sampling location at the Kukuavile community along Ankobra River, Ghana highlighting the highly turbid water found near mining sites.
Grated cassava root soaking in alum-processed river water, Kukuavile community along Ankobra River, Ghana.
Grated cassava root soaking in alum-processed river water, Kukuavile community along Ankobra River, Ghana.
USGS chemist Grace Armstrong is accessing Ankobra River sampling site with community consent and accompaniment.
USGS chemist Grace Armstrong is accessing Ankobra River sampling site with community consent and accompaniment.
USGS chemist Grace Armstrong collecting a sediment core for mercury analysis at the Kukuavile community along Ankobra River, Ghana.
USGS chemist Grace Armstrong collecting a sediment core for mercury analysis at the Kukuavile community along Ankobra River, Ghana.
Large volume surface water collections for mercury isotopes in Lake Erie on the US EPA research vessel Lake Explorer II.
Large volume surface water collections for mercury isotopes in Lake Erie on the US EPA research vessel Lake Explorer II.
Two scientists guide sampling equipment attached to large crane, on to deck of boat.
USGS is conducting sediment collection for metals and mercury analysis for Lake Erie, on the US EPA research vessel Lake Guardian.
Two scientists guide sampling equipment attached to large crane, on to deck of boat.
USGS is conducting sediment collection for metals and mercury analysis for Lake Erie, on the US EPA research vessel Lake Guardian.
USGS scientists collecting phytoplankton for mercury and per- and polyfluoroalkyl substances (PFAS) analyses in Saginaw Bay of Lake Huron.
USGS scientists collecting phytoplankton for mercury and per- and polyfluoroalkyl substances (PFAS) analyses in Saginaw Bay of Lake Huron.
Collection of water and phytoplankton for metals analysis in Lake Mendota, Wisconsin. M3 Research Lab researchers collect in two to five liter containers and then filter and size fractionate the samples at the lab process these samples back at the lab to determine the amount of mercury and metals entering the food web.
Collection of water and phytoplankton for metals analysis in Lake Mendota, Wisconsin. M3 Research Lab researchers collect in two to five liter containers and then filter and size fractionate the samples at the lab process these samples back at the lab to determine the amount of mercury and metals entering the food web.
USGS scientist Grace Armstrong is demonstrating how we collect plankton in lake waters, by towing the plankton net in Lake Mendota, Wisconsin.
USGS scientist Grace Armstrong is demonstrating how we collect plankton in lake waters, by towing the plankton net in Lake Mendota, Wisconsin.
USGS scientist Grace Armstrong sampling plankton on Lake Mendota in Madison, Wisconsin.
USGS scientist Grace Armstrong sampling plankton on Lake Mendota in Madison, Wisconsin.