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
出处
《中国无机分析化学》
CAS
2017年第1期72-74,共3页
Chinese Journal of Inorganic Analytical Chemistry
关键词
湿法磷酸
二氧化硅
硅钼蓝
分光光度法
wet-process phosphoric acid
silica
silicon-molybdenum
spectrophotometry
