氯化银比浊法测定炉水中的微量氯离子

用硝酸调节炉水的酸度，氯离子与硝酸银反应生成氯化银沉淀，用氯化银分光光度法，测定炉水中的微量氯离子。测定波长为410nm，线性范围15～2200μg/L。结果表明：其吸光值的大小与氯离子生成沉淀的多少成正比，符合朗伯一比尔定律。该法准确、快速、简便、安全，其它的常见离子无干扰。

The Test Determination of Trace Amount of Chlorine Ion in Boiler Water with Silver Chlorination Nephelometery

Using the nitric acid to regulate the acidity of boiler water, chlorine ion reacts to silver nitrate and produce silver chlorination precipitate. Using silver chlorination spectrophotometry, we can test the content of trace amount of chlorine ion in boiler water. The wave-length was 410 nm, the content scope was 15-2200 μg/L in the test. As a result： the absorbency at 410 nm was proportional to the content of silver chlorination precipitate in the solution produced by the chlorine ion in boiler water, which conforms to Lambert-Beer＇s law. The method was accurate, rapid, simple and safe, and had no interference of other familiar ions.