The U.S. Environmental Protection Agency (EPA) finalized Test Methods 1633 and 1621, environmental sampling methods for analyzing up to 40 target per- and polyfluoroalkyl substances (PFAS) in soil, ...
Mg isotope compositions of some typical geological standard samples measured by the DS method and the SSB method in different laboratories. The sample-standard-bracketing (SSB) method and double-spike ...
"Reliable, standardized and replicable methodologies for quickly assessing key ecosystem values in the field are essential for conservation planning and decision-making at the local to regional scale ...
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