论文部分内容阅读
硅酸影响钙、镁的络合滴定,通常碱熔试样需要分离测定,手续繁锁。资料介绍采用氟盐消除二氧化硅的影响,效果良好,甚至可用于硅石测定。但由于氟盐与钙、镁离子同样生成难溶沉淀,此法氟盐加入量需根据试样含硅量多少而增减,很不方便。本文在上法基础上试验采用酒石酸配合氟盐消除硅酸干扰,试样含硅量多少没有影响。其它干扰离子采用酒石酸—三乙醇胺—乙二胺混合掩蔽,达到不分离直接测定矿石中钙、镁的含量,方法简便、准确度较好。
Silicate affects calcium and magnesium complexation titration, usually alkali-melting samples need to be separated and measured, complicated procedures. Information Describe the use of fluoride salts to eliminate the impact of silica, the effect is good, and even available for the determination of silica. However, due to fluoride salts and calcium, magnesium ions also generate insoluble precipitate, the amount of fluoridation method according to the amount of sample silicon increase or decrease, very inconvenient. In this paper, based on the trial of tartaric acid with fluoride to eliminate interference with silicate, silicon content of the sample has no effect. Other interfering ions are masked by tartaric acid-triethanolamine-ethylenediamine mixed to directly determine the content of calcium and magnesium in the ore without separation, the method is simple and the accuracy is better.