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一、前言含磷有机化合物中硫的微量分析,一直没有较圆满的方法。沿用的简便快速的氧瓶分解—钡盐滴定法,其最大的缺点为终点不明显与磷元素的干扰。Selig 以氧瓶分解有机硫样品,而后用高氯酸铅溶液电位滴定 SO_4~(2-),以铅离子选择电极为指示电极,亦存在同样的问题。采用预先分离 PO_4~(3-)的办法其操作程序是很繁琐的。
I. Introduction Microanalysis of sulfur in phosphorus-containing organic compounds has not been a satisfactory solution. Follow the simple and quick oxygen bottle decomposition - barium salt titration, the biggest drawback is the end point is not obvious and phosphorus interference. Selig also decomposes organic sulfur samples with oxygen bottles, and then titrates SO 4 2- with lead perchlorate solution. The same problem exists with the lead ion selective electrode as the indicator electrode. The use of pre-separation PO_4 ~ (3-) approach to its operating procedures is very tedious.