ISO 2121:1972 工业用液态氯.水含量的测定.重量法

标准编号：ISO 2121:1972

中文名称：工业用液态氯.水含量的测定.重量法

英文名称：Liquid chlorine for industrial use — Determination of water content — Gravimetric method

发布日期：1972-07

标准范围

该方法涉及“挥发性水”的测定，即与氯同时挥发的水。适用于含水量大于00005%（m/m）的产品。不应将其应用于储存在易受腐蚀的瓶子中的样品。其原理是通过将气化样品放入含有五氧化二磷或高氯酸镁的去皮吸收剂中来吸收水。用加热至80°C的空气或干燥氮气冲洗，以消除气态氯和挥发性杂质。在装有氢氧化钠溶液的皮重瓶中吸收氯。对吸收器进行称重，通过与原始质量的差异确定水的质量。

The method relates to the determination of the "volatile water", that which volatilizes at the same time as the chlorine. It is applicable to products having a water content greater than 0,0005 % (m/m). It should not be applied to samples stored in bottles subject to corrosion. The principle consists in absorption of the water by passing the gasified sample into tared absorbers containing phosphorus pentoxide or magnesium perchlorate. Elimination of the gaseous chlorine and volatile impurities by flushing with air or dry nitrogen heated to 80 °C. Absorption of the chlorine in a tared bottle containing sodium hydroxide solution. Weighing of the absorbers to determine, by difference from the original masses, the mass of water.

标准预览图