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我们于1980年提出用紫外分光光度法测定空气中联苯,联苯醚或其混和物(道生)。经多年来的使用及各单位的验证结果,表明本法具有使用试剂少、操作简单、条件易控,分析速度快以及灵敏度和重现性好等优点。并经现场应用,测定结果颇与现场实际情况相吻合。 本文旨在对长期使用中发现的个别不足之处作改进研究。对原法略作改动,即吸收液(乙醇水溶液)的浓度由20％改成40％(v/v),采样瓶由多孔玻板改用撞击式;与此同时,结合车间空气中有害物质监测检验的实际,还讨论了共存物干扰的评价方法,现将结果报告如下
We proposed in 1980 the use of UV spectrophotometry for the determination of biphenyls, diphenyl ethers or their blends in the air (Dawson). After many years of use and the verification result of each unit, it shows that this method has the advantages of less reagents, simple operation, easy control of conditions, fast analysis, good sensitivity and reproducibility. And the field application, the measured results quite consistent with the actual situation on the scene. The purpose of this article is to improve the individual weaknesses found in long-term use. The original law made some changes, that is, the absorption solution (ethanol solution) concentration from 20% to 40% (v / v), the sampling bottle from the perforated glass plate to impact; at the same time, combined with the workshop air harmful substances Monitoring the actual test, but also discussed the evaluation method of coexistence of interference, the results are reported as follows