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以4、6、8小时采样测定室内空气IP浓度,分析不同采样时间测定值的精密度和分析误差。结果得到,当IP浓度<0.300mg/m~3时,8小时采样测定结果的变异系数最小,分析允许相对误差小于或近接10％,由此确立室内IP测定采样时间8小时适宜。同时在室内外空气悬浮颗粒物同步测定中分析了IP与TSP的关系,得到室内悬浮颗粒污染以IP为主。
The indoor air IP concentration was sampled at 4, 6 and 8 hours, and the precision and analysis error of the measured values at different sampling times were analyzed. The results showed that when the IP concentration was less than 0.300mg / m ~ 3, the coefficient of variation of the 8-hour sampling was the smallest, and the relative allowable error was less than or close to 10%. Therefore, it was suitable to establish the sampling time of indoor IP for 8 hours. At the same time, the relationship between IP and TSP was analyzed in the simultaneous determination of indoor and outdoor airborne particulate matter. The results showed that indoor suspended particle pollution was mainly IP.