柠檬酸—硝酸铝溶剂溶解磷灰石中全磷

A Chemical Pretreatment Method for the Determination of Phosphorus in Apatites with Citric Acid Aluminum Nitrate as Solvent

摘要: 试验了用柠檬酸＿Ａｌ（ＮＯ３）３溶液做溶剂分解磷灰石的预处理方法。结果表明，在微沸加热６ｍｉｎ条件下，质量浓度分别为３２ｇ／Ｌ和９０ｇ／Ｌ的柠檬酸＿Ａｌ（ＮＯ３）３混合溶剂可以有效地分解磷灰石，测定全磷的回收率＞９９％，与王水溶样结果相符，并用测定磷灰石标样中全磷进行验证，说明方法可靠。

Abstract: A chemical pretreatment method for the determination of total phosphorus in apatite with citric acid_aluminum nitrate as solvent is described in this paper. The results show that the mixed solvent of citric acid and aluminum nitrate with mass concentratio