为了探究影响洛阳市区PM2.5的主要因素,对PM10、AQI中其他监测指标、月平均温度等进行主成分回归分析.首先对数据进行标准化处理,通过主成分分析得到3个主成分变量;其次对它们与PM2.5进行逐步回归分析,得出O3、PM10和CO对PM2.5影响显著;最后,针对这几个影响因素,对洛阳市环保部门提出合理性建议.

By selecting the best experimental condition and severing the influence of the coexists, this paper builds the method of determining the trace formaldehyde in air by acetylaceptone fluorephotometry The limit of detection of this method is 0 0034μg/ml The relative standard deviation is 5 6%, the lowest detective concentration of formaldehyde in air is 0 0057mg/m 3 This method could determine the formaldehyde in background and polluted air, by formaldehyde