USN 기술을 이용한 미세먼지 측정장치의 성능 평가

초록

The measurements were performed from 24 March 2010 to 9 April 2010. PMX and the dust spectrometer measured PM10 levels of 98.3 and 40.7 ug/m', respectively, and PM25 concentrations of 86.5 and 16.6 ug/m', respectively. The monitored PM levels were investigated in a bimodal form during the sampling period. The PM10 and PM25 average correlations between PMX and the dust spectrometer were r2=0.81 and r2= 0.97, respectively. The two systems showed a similar time series trend, even though the measured values differed. A simple correlation analysis of the two data groups showed coefficients of determination of 0.7 for PM10 and 0.9 for PM2.5. The PMX data were mostly concentrated around the trend curve. Therefore, calibration of PMX data was required prior to use in the field. For the calibration, simple linear regression and nonlinear regression were used. The resulting correlation coefficients of simple linear regressions were 0.8 for PM10 and 0.9 for PM25, whereas those for nonlinear regressions were 0.7 for PM10 and 0.9 for PM2.5. The higher correlation coefficient for PM10 by the nonlinear regression indicates that it is the better method for calibrating the system developed in this study.