대기 중 다환방향족탄화수소(PAHs)의 측정.분석 신뢰도 향상에 관한 고찰

Abstract

In this study, various techniques for measurement and analysis of PAHs in the ambient air were verified in order to select a more reliable method. Sampling and analysis of PAHs were done by the EPA TO-13a method. QA/QC of the measurement was conducted to minimize errors in sampling and analyzing processes. The linearity of calibration curve of the PAH standards was good (<TEX>$R^2{\geq}0.99$</TEX>). Audit accuracy was evaluated using 5 internal standards of PAHs (<TEX>$Naphthalene-d_8,\;Acenaphthene-d_{10},\;Phenanthrene-d_{10},\;Chrysene-d_{12},\;Perylene-d_{12}$</TEX>). Relative standard deviations of the internal standard of the PAHs were ranged from 6.22% for <TEX>$acenaphthene-d_{10}$</TEX> to 8.11% for <TEX>$chrysene-d_{12}$</TEX>. To evaluate the surrogate recoveries, two field surrogate standards of PAHs (<TEX>$fluoranthene-d_{10},\;benzo(a)pyrene-d_{12}$</TEX>) and two extract surrogate standards of the PAHs (<TEX>$fluorene-d_{10},\;pyrene-d_{12}$</TEX>) were spiked into all samples before field sampling and sample extraction, respectively. Recoveries of field the surrogate standards ranged from <TEX>$80.4{\pm}12.2%$</TEX> for <TEX>$fluoranthene-d_{10}$</TEX> to <TEX>$66.2{\pm}12.8%$</TEX> for <TEX>$benzo(a)pyrene-d_{12}$</TEX>. Extraction recoveries of the surrogate standards ranged from <TEX>$70.4{\pm}10.2%$</TEX> for <TEX>$fluorene-d_{10}$</TEX> to <TEX>$77.6{\pm}10.8%$</TEX> for <TEX>$pyrene-d_{10}$</TEX>. The detection limit of benzo(a)pyrene among 16 PAHs standards for quantitation was 20 pg.