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大气中的砷是以气态或气溶胶态存在的。本文概要地将其测定法及注意事项加以介绍。样品采集用大流量或低流量采样器采集气溶胶态样品,采样器的放置及使用方法,参照日本大气污染物测定方法的有关规定。气溶胶态砷的分析,与铁、锰、锌、铜、铅等元素一样,用滤料采集后连同滤料一起消化。目前,采集样品的各种滤料已有市售品,均可用于气溶胶态砷的采集。但在玻璃制造过程中,有时加入砷做消泡剂,故使用前应检查玻璃纤维滤料中砷含量和洗脱量。样品的消化一般采用碱熔融、硫酸-硝酸分解和硫酸-
Arsenic in the atmosphere is in a gaseous or aerosol state. This article briefly describes its assays and precautions. Sample collection Large flow or low flow sampler to collect aerosol samples, samplers placed and use methods, with reference to Japan’s air pollutants determination of the relevant provisions. Aerosol analysis of arsenic, like iron, manganese, zinc, copper, lead and other elements, with the filter media collected together with the filter to digest. Currently, a variety of filter media have been collected samples of commercial products, can be used for the collection of aerosol-state arsenic. However, in the glass manufacturing process, sometimes adding arsenic defoamers, it should be checked before use glass fiber filter arsenic content and elution. Sample digestion using alkali melting, sulfuric acid - nitric acid decomposition and sulfuric acid -