硅钼蓝分光光度法测定湿法磷酸中的二氧化硅  

Determination of Soluble Silica Content in Wet-process Phosphoric Acid by Silicon-Molybdenum Blue Spectrophotometry

作　　者：毛端平 何西平[2] 杜建侠 郝晓斌 

机构地区：[1]湖北省兴发磷化工研究院有限公司,湖北宜昌443000 [2]湖北兴发化工集团股份有限公司,湖北宜昌443000

出　　处：《中国无机分析化学》2017年第1期72-74,共3页Chinese Journal of Inorganic Analytical Chemistry

摘　　要：采用硅钼蓝分光光度法直接测定湿法磷酸中的可溶性二氧化硅。显色时,利用草酸消除大量磷酸根的干扰。方法操作简单,稀酸和浓酸中可溶性二氧化硅测定结果的相对标准偏差分别为1.6%、6.2%,加标回收率均在96%~103%,测定结果的准确度及精密度均能满足工业分析的要求。In silicon- acid in dilute -molyb the eo acid an 103 %. The this paper, the contents ot soluble SiO2 in wet-process phosphoric acid were determine denum blue spectrophotometry. The interference of phosphate could be eliminated by o lor reaction. The method is simple. The relative standard deviations （RSDs） of SiO2 in d concentrated acid mediums were 1.6% and 6.2%, respectively. The recoveries were 96 accuracy and precision of the method could meet the requirements for industrial analysis. d by xalic

关 键 词：湿法磷酸 二氧化硅 硅钼蓝 分光光度法 

分 类 号：O657.32[理学—分析化学] TH744.12[理学—化学]