【摘要】 本文提出用稀硝酸浸提样品中氯化物,用氢氧化钠调节溶液至碱性,加过氧化氢,加热、过滤分离去除干扰离子。在硝酸介质中,通过比浊法测定水泥混凝土中微量氯化物。本法检测限为0.305μg,线性范围在2.0-60μg,方法回收率在97.2-101.4%之间。结果表明,该法具有仪器简单,结果准确,无毒环保的特点。更多还原

【Abstract】 This article introduces a method for determination of trace chlorite in cement concrete. In this method dilute nitric acid is used to separate choride from the sample. The solution is then regulated to alkaline with sodium hydroxide and added with hydrogen peroxide, heated and filtered to eliminate disturbing ions. trace chloride in the cement concrete is determined turbidimetry. The lower detecting limit is 0.305μg and the linear ange is 2.0～60μg. The recoveries are between 97.2～101.4%.The results show that this method is simple, accurate and environment friendly.更多还原