Quality control guidance for sampling and analysis of air toxics

摘要

all environmental measurements reuire quality control to support the usability of analytical results, which is why effective and comprehensive quality control procedures are critical in performing accurate air toxics measurements. Lack of quality control can add significant error to environmental measurements. The U.S.EPA has estimated that 95 percent of the total error in environmental measurements is due to sample collection and handling (85 percent from sample collection and 10 percent from subsampling in the laborator) and that 5 percent is due to the laboratory analysis. Effective quality control measures help reduce analystical errors and produce meaningful analytical results.