EPA (Environmental Protection Agency) Method Study 31: Trace Metals by Atomic Absorption (Furnace Techniques)

摘要

An interlaboratory study in which 10 laboratories participated was conducted to provide precision and accuracy statements for the analysis of 18 metals by graphite furnace atomic absorption spectrometry. Samples were prepared and analyzed using procedures specified in 'Methods for Chemical Analysis of Water and Wastes,' EPA PB84-128677, U.S. Environmental Protection Agency, Environmental Monitoring and Support Laboratory, Cincinnati, Ohio, March 1979. The study design was based on Youden's non-replicate design for collaborative tests of analytical methods. Three Youden pair samples of the test metals were spiked into six types of test waters and then analyzed. The test waters were three industrial effluents supplied by ERCO and three waterssupplied by the subcontractor laboratories (laboratory pure water, finished drinking water, and surface water). The resulting data were statistically analyzed using the computer program entitled 'Interlaboratory Method Validation Study' (IMVS).