【摘要】 报道了用示波滴定法测定黄原酸钾含量 ,在 p H5～ 6的 HAc- Na Ac缓冲底液中 ,加入四苯硼钠 ( Na- TPB)沉淀 K+ ,过量的 Na- TPB用氯化四乙基铵标准溶液滴定 ,滴至 Na- TPB示波图切口消失为终点 ,终点直观敏锐 ,方法快速简便 ,准确度、精密度均高。标准加入回收率在 99.8%～1 0 0 .2 % ,RSD<0 .2 %更多还原

【Abstract】 Oscillographic titration is employed in the determination of potassium xanhate. K + can be quantitatively precipitated with sodium tetraphenylboron(Na\|TPB) in HAC\|NaAC buffer solution (pH5~6) and the amount of excess Na\|TPB can be determined by oscillographic titration with a standard solution of tetraethylammonium chlorid monohydrat. The recovery is 99.8%~100.2% and RSD is less than 0.2%. The method is accurate, rapid and simple.更多还原