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在生产环境中有机溶剂气体的采样,多数用活性碳采样管;要把所有溶剂从活性碳中溶出,必须提高其解吸率。作者探讨了用二硫化碳(CS_2)和二甲亚砜(DMSO)混合溶剂以提高各种混合有机溶剂的解吸率方法。作者将30～60目的椰子壳活性碳100 mg装于内径约4mm的玻璃管中,将常用的16种有机溶剂分成5组混合液进行试验。先将1μl溶剂直接注入活性碳管下端的玻璃棉中。活性碳管直立放置一夜,使活性碳充分吸附蒸发的溶剂,这相当于采样500 ml分析的浓度93.0(正己烷)～302.0 ppm(甲醇)。将上述吸附样品的活性碳移入约4 ml的
In the production environment of organic solvent gas sampling, the majority of activated carbon sampling tube; To dissolve all the solvent from the activated carbon, you must increase its desorption rate. The authors explored a method of increasing the desorption rate of various mixed organic solvents by using a mixture of carbon disulfide (CS 2) and dimethyl sulfoxide (DMSO). The author will 30 ~ 60 purpose coconut shell activated carbon 100 mg installed in a glass tube with an inner diameter of about 4mm, the commonly used 16 kinds of organic solvents were divided into five groups of mixed liquid test. 1 μl of solvent is injected directly into the glass wool at the bottom of the activated carbon tube. The carbon tube is left standing overnight, allowing the activated carbon to fully adsorb the evaporated solvent, which corresponds to a concentration of 93.0 (n-hexane) to 302.0 ppm (methanol) of the sample 500 ml. Move the above activated carbon sample to about 4 ml