光卤石中高含量镁的自动快速测定

Automatic and Rapid Determination of High Content of Magnesium in Carnallite

提出一种自动快速测定高含量镁的新方法。以偶氮氯膦Ⅲ为显色剂，用流动注射法注入和稀释样品，在ＰＨ为１０．２的硼砂一氢氧化钠介质中，镁含量在０～５０ｍｇ／ｍｌ范围内有良好的线性关系，分析速度为１５个样／ｈ，大量钾钠及微量钙不干扰测定。该法用于光卤石中２０％的ＭｇＣｌ２的测定，其结果与ＥＤＴＡ滴定法非常一致。

he method for detemination of high content of Mg by flow injectiow analgsis(FIA ) of automatic sampling and solution deliquated technique is described. In Na2B4O7NaOH huffer solution of pH = 10. 2, chlorophosphonazo R (CPA Ⅲ) was used as development reageat, the liner range of the method is 0～50mg/ml, (or 0～ 20mol/L) the measuringrate is 15 samples/h.A carge amount of K, Na and trace amount of ca do not interfere determination, the method was used to determination of magnesium in carnallite samples with satisfactory results.,