【摘要】 根据2002年春季沙尘暴细颗粒物无机组分的漫反射红外傅立叶转换光谱,确定了沙尘暴颗粒物中含有碳酸盐、硝酸盐、硫酸盐和SiO2类物质,并与透射红外光谱进行了比较.定量测定了沙尘暴期间细颗粒物中NO3-的含量,与离子色谱结果一致,从而建立了直接测定大气颗粒物无机组分的漫反射红外傅立叶转换光谱方法.更多还原

【Abstract】 Diffuse Reflectance Infrared Fourier Transform Spectroscopic (DRIFTS) was used to analyze inorganic components in PM2.5 and PM10 samples collected during the dust storm in the spring of 2002. Carbonate, nitrate, sulfate and silicon dioxide on the surfaces of the samples were identified with the DRIFTS and the results were compared with that of the transmission FTIR. The NO3- concentrations of the PM2.5 samples of the dust storm were quantitatively measured with the DRIFTS, and the results agree well with that measured with ion chromatograph. The method using the DRIFTS to directly measure inorganic components in airborne particles is proved feasible.更多还原