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磷铁中磷的測定,使用较多的要算过氧化钠熔融、磷钼酸銨沉淀酸碱滴定法。該方法手續繁慢。使用絡合滴定法測定磷,資料中早有介紹。但是,关于如何利用絡合滴定浊測定磷铁中磷,还很少介紹。由于磷铁含磷较高(約8～15%),采用比色分析,若沒有較好仪器,很难得出滿意結果。我們采用硝酸-氢氟酸溶样,絡合滴定法,测定磷铁中磷。經試驗证明,能得出滿意结果。且終点清楚,易判断。
Determination of phosphorus in iron and phosphorus, the use of more to be considered sodium melting, ammonium phosphomolybdate precipitation acid-base titration. The method is slow. The use of complexometric titration of phosphorus, data has long been introduced. However, there is still little description on how to use complexometric turbidimetry to determine phosphorus in iron and phosphorus. Due to the high phosphorus content of phosphorus (about 8 ~ 15%), the use of colorimetric analysis, if there is no better instrument, it is difficult to come to satisfactory results. We use nitric acid - hydrofluoric acid solution, complex titration, determination of phosphorus in iron and phosphorus. Proved by the test, can produce satisfactory results. And the end point is clear, easy to judge.