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EVALUATION OF PRECISION OF EPA METHODS 3A, 6C, AND 7E
Citation:
Logan, T.J., W. Reynolds, W. Eaton, AND E. Lieberman. EVALUATION OF PRECISION OF EPA METHODS 3A, 6C, AND 7E. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/A-93/033 (NTIS PB93158822), 1993.
Description:
The U.S. EPA sponsored a study to estimate the precision (repeatability and reproducibility) and systematic error of EPA Test Methods 3A, 6C, and 7E. hese are instrumental methods for concentration determinations of diluent gases (oxygen [O2] and carbon dioxide [CO2]), sulfur dioxide (SO2), and nitrogen oxides (NOx). he four laboratory collaborative study was conducted at a 500-megawatt, coal-fired power plant. eproducibility estimates, based on relative standard deviation (RSD), from simultaneous stack gas measurements by the four test laboratories were approximately 1 1/2% or SO2 measurements and approximately 3% for NOx and oxygen (O2). eproducibility and repeatability estimates from measurements of audit gases were all equal to or less than 1 1/2% RSD. verage systematic errors for individual labs, relative to NIST traceable audit gases, were all less than 3%. ystematic errors are approximately the same as the expected accuracy of calibration gases.
