Filters: Tags: Quality control (X)150 results (342ms)
Field spikes were prepared at 207 stream and river sites as part of the U.S. Geological Survey (USGS) National Water Quality Assessment (NAWQA) project between December, 2012, and September, 2015. At the field site, a depth-and width-integrated environmental sample was collected, and one subsample of the environmental sample was spiked with a known amount of a spike mixture. Both the spiked subsample ("spike sample") and another subsample ("environmental sample") of the original water sample were analyzed for pesticides at the USGS National Water Quality Laboratory (NWQL) by direct injection liquid chromatography with tandem mass spectrometry (LC-MS/MS), and were used to calculate the spike recovery of each analyte....
Simple laboratory tests that can predict the potential pathogenicity of strains of Vibrio parahaemolyticus isolated from shellfish of the west coast of the United States
Coliforms, Escherichia coli and Salmonella serovars associated with a citrus-processing facility implicated in a Salmonellosis outbreak
Lead determination in avian blood: Application to a study of lead contamination in raptors from France.
Impacts of agricultural practices on soil and water quality in the Mediterranean region and proposed assessment methodology
Evaluation of Ferulic Acid for Controlling the Musty-Odor Cyanobacterium, Oscillatoria perornata, in Aquaculture Ponds
Nuclear Waste: Preliminary Observations on the Quality Assurance Program at the Yucca Mountain Repository
Standard probability density functions of characterizing water quality variables in dimictic glacial/boreal lakes