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目的研究公共场所可吸入颗粒物(PM10)自动监测和人工监测结果的比较,为公共场所空气中可吸入颗粒物浓度变化的实时监测分析提供依据。方法利用自动监测设备采集公共场所PM10,用激光粉尘仪作为对照,比较2种方法采集PM10结果的一致性。结果在商场内设置4个监测点,分别进行人工监测和自动监测平行采样,共采集98组数据。人工监测PM10浓度中位数278.5μg/m3(27μg/m3～516μg/m3),自动监测PM10浓度中位数245.5μg/m3(33μg/m3～397μg/m3),2组平行监测样品浓度间差异无统计学意义(Z=-0.443,P=0.658),人工监测和自动监测散点图变化趋势一致(r=0.961,P<0.001)。结论自动监测与人工监测空气中可吸入颗粒物浓度结果比较,数据的一致性好。
Objective To compare the results of automatic monitoring and manual monitoring of inhalable particulate matter (PM10) in public places, and to provide a basis for real-time monitoring and analysis of the change of respirable particulate matter concentration in air of public places. Methods Automated monitoring equipment was used to collect PM10 in public places. Laser dust analyzer was used as a control to compare the consistency of PM10 results collected by the two methods. Results Four monitoring points were set up in the shopping mall, and manual monitoring and automatic monitoring of parallel sampling were conducted respectively. A total of 98 sets of data were collected. The median PM10 concentration was 278.5μg / m3 (27μg / m3 ~ 516μg / m3). The median PM10 concentration was automatically monitored at 245.5μg / m3 (33μg / m3 ~ 397μg / m3) There was no statistical significance (Z = -0.443, P = 0.658). The trends of manual monitoring and automatic monitoring of scatter plot were the same (r = 0.961, P <0.001). Conclusion The results of automatic monitoring and manual monitoring of airborne respirable particulate matter concentration are consistent and the data are consistent.