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本文叙述以氧瓶燃烧法和钼蓝光度法微量测定有机和高分子化合物中磷元素的方法。对于不同类型样品进行实验的结果表明,用氧瓶法分解含磷化合物是可靠的。在分析难分解化合物时,可利用乙二醇为助燃烧剂和高氯酸铵为助氧化剂使样品燃烧完全;对于含硅化合物则必须用碳酸钠作为助熔剂始能得到满意的结果。本文并对以抗坏血酸为还原剂,三价铋离子为催化剂的钼蓝光度法进行了研究,找出最佳的操作条件,对于某些元素的存在所引起的干扰作用也进行了实验。方法快速、简便而准确。
This article describes a method for the determination of phosphorus in organic and polymer compounds by oxygen flask combustion and molybdenum blue photometry. The results of experiments on different types of samples show that it is reliable to decompose the phosphorus-containing compounds by the oxygen bottle method. In the analysis of refractory compounds, ethylene glycol can be used as a pro-combustion agent and ammonium perchlorate as a co-oxidant to make the sample burn completely; for silicon-containing compounds, sodium carbonate must be used as a flux to get satisfactory results. In this paper, molybdenum blue photometry with ascorbic acid as reductant and trivalent bismuth ion as catalyst has been studied to find out the optimal operating conditions, and experiments have also been conducted on the interference caused by the presence of some elements. The method is fast, easy and accurate.