各种气体中微量水的测定,过去所遇到较困难的问题是没有理想的水作标准。有的作者用氮气中的水作标准,有的用硫酸饱和蒸汽,这些都要较长时间才能达到稳定。苏联佩列古德在分析空气中乙炔时曾使用一种无机盐混合溶液作为目视比色的乙炔标准,此混合液的离子颜色,相当稳定,使用方便。我们将它作为氮气等微量水分光光度测定水的标准,灵敏度可达0.1μg/ml。现将实验方法及其测定结果介绍如下。 Determination of trace amounts of water in various gases, the more difficult problem encountered in the past is the lack of ideal water standards. Some authors use nitrogen in the water as a standard, and some saturated steam with sulfuric acid, these will take a long time to achieve stability. Pelligold Soviet Union used in the analysis of acetylene in the air had used an inorganic salt solution as a visual colorimetric acetylene standard, the color of the mixture of ions, quite stable, easy to use. We use it as a standard for the determination of water by micro-spectrophotometry such as nitrogen, with a sensitivity of 0.1 μg / ml. Now the experimental method and its measurement results are described below.