硅钼蓝分光光度法测定磷矿石中的二氧化硅

Silico-Molybdenum Blue Spectrophotometry Determinqtion of Silicon Dioxide in Phosphate Mine

对硅钼蓝分光光度法测定磷矿石中的二氧化硅进行了研究。研究了硅钼黄的显色条件及干扰因素，在本方法试验控制Ｈ２ＳＯ４浓度范围内硅与钼酸钠生成硅钼黄，经ＦｅＳＯ４还原成硅钼蓝，ＳｉＯ２含量在０～６００μｇ／１００ｍｌ范围内服从比耳定律。操作简便，重现性好，结果准确，测定磷矿石中的二氧化硅含量，结果满意。

Silico-molybdenum blue spectrophotometry determination of sillicon dioxide in phosphate mine was studied in this paper.Silico-molybdenum yellow chromogenic condition and interfere factors have been studied.Sillico-molybdenum yellow is reduced to sillico-molybdenum blue by ferrous sulfate.Beer's law is obeyed in the concentration range of SiO 2 0-600μg/100ml.This method is simple on sinicon dioxide in phosphate mine with satisfactory results.