USEPA (United States Environmental Protection Agency) Method Study 35.SW Method 3005. Acid Digestion of Waters for Total Recoverable or Dissolved Metals for Analyses by Flame Atomic Absorption Spectroscopy

摘要

An interlaboratory collaborative study was conducted to determine the precision and bias (recovery) of Solid Waste (SW) Method 3005 for the analysis of 21 elements in ground water. The study design was based upon Youden's non-replicate plan for collaborative tests of analytical methods. Each water type was spiked with six concentrations (as three Youden pairs) of the 21 test elements and was prepared using nitric/hydrochloric acid digestion and analyzed by Atomic Absorption (AA-Direct Aspiration). Test data from three spiked ground water sources were compared against reagent water which was used as a control. The study produced, for each element, measures of precision and mean recovery for the acid digestion/AA-Direct Aspiration and compared the performance of the method between water types and reagent water.