FP(FilterPacks)法同时测定大气中的SO2和颗粒物

用二层采样头同时采集大气中的二氧化硫和颗粒物的方法。分别用国产玻璃纤维滤膜和中速定量滤纸，1％K₂CO₃－10％Gly溶液制作浸渍膜，两种浸渍膜现场采集二氧化硫的效率分别为99．4％和95．7％。通过降低碳酸钾溶液浓度(由25％降为1％)及使用强酸性阳离子交换树脂，大大降低了样品中碳酸根离子的浓度，减小了基体效应，提高了测定硫酸根离子的准确度和灵敏度。经测定，1％K₂CO₃－10％Gly溶液浸渍膜(90mm)对二氧化硫的采集容量为160 μg／cm2。试验结果表明，浸渍膜法和盐酸副玫瑰苯胺法测定大气中二氧化硫的结果相近，相对偏差为4．3％，两种方法测定二氧化硫浓度有着良好的线性关系(r＝0．993) 

Simultaneous Determination of Atmosphericsul fur Dioxide and Partculate with Filter Packs Method

A method has been developed for simultaneous sampling of atmospheric sulfur dioxide andparticulate with 1%K2CO3-10%Gly impregnated filters which are made with domestic glass fiber fil-ters and medium quantitative fiIter paper,respectively. The efficiency to collect sulfur dioxide with these two filters is 99.4%and 95.7%,respectively. The matrix effect caused by carbonate has been reduced by decreasing the concentration of K2CO3(from 25%to 1%)and by using strong acidic posi-tive ion-exchange resin,and the accuracy and the sensitivity of to be determined have been greatly increased.The sampling capacity of sulfur dioxide of 1%K2CO3-10%Gly impregnated filter(90 mm )has been proved to be 160g/cm2. The standard deviation of determining ambient sulfurdioxide between impregnated and PRA methods is very low,only 4.3%。Correlation coefficient is 0.993.