【摘要】 依据四苯硼钠—季铵盐容量法滴定K+离子的原理,采用质量滴定法,考察了滴定速度、松节油加入量对四苯硼钠与季铵盐反应的影响及共存离子(包括Li+、Mg2+、Ca2+、SO42-、B4O72-、CO32-)对K+含量测定结果的影响。当测定K+离子含量在5～15 mg范围内,松节油最佳加入量为25滴,分析误差<0.3%。更多还原

【Abstract】 According to the principle of sodium tetraphenylborate-ammonium ions volumetry,the effects of the titration speed,the terebinthine quantity addition and the coexist ions including Li+,Mg2 +,Ca2 +,SO42-,B4O72-,and CO32- were studied by mass titration method.The experiment results confirmed that when the content of potassium is between 5 mg and 15 mg,the best addition of turpentine oil is 25 drops and the analytical error is less than 0.3%.更多还原