摘要
在湿法磷酸净化的过程中,溶剂MIBK的使用显著影响了砷斑法测定砷含量的精确性。本研究采用原子荧光光度计,探究了不同消解液组合及其配比对测定结果的影响,从而确定了在MIBK质量分数为0.1%~1%的范围内,湿法净化磷酸的最佳消解条件。研究发现,当浓硫酸与浓硝酸的体积比在2∶3~2∶7之间时,砷含量的相对标准偏差可控制在1%以下,回收率介于95%~105%之间。结果表明,该方法为测定含溶剂湿法净化磷酸中杂质砷含量提供了一种简便、快速且准确可靠的分析手段。
During the wet purification process of phosphoric acid,the use of the solvent MIBK significantly affects the accuracy of arsenic determination by the arsenic spot method.This study employed an atomic fluorescence spectrometer to explore the effects of different digestion solution combinations and their ratios on the determination results,thereby determining the optimal digestion conditions for wet purification of phosphoric acid within the range of MIBK content from 0.1%to 1%.It was found that when the volume ratio of concentrated sulfuric acid to concentrated nitric acid was between 2:3 and 2:7,the relative standard deviation of arsenic could be controlled below 1%,with a recovery rate between 95%and 105%.The results indicate that this method provides a simple,rapid,and accurate and reliable analytical approach for determining the content of impurity arsenic in solvent-containing wet-purified phosphoric acid.
作者
徐玮
杜建侠
宫小康
李红
余晓英
卢会珍
Xu Wei;Du Jianxia;Gong Xiaokang;Li Hong;Yu Xiaoying;Lu Huizhen(Hubei Three Gorges Laboratory,Yichang Hubei 443000,China;Yidu Xingfa Chemical Co.,Ltd.,Yidu Hubei 443300,China)
出处
《山西化工》
2025年第3期86-88,102,共4页
Shanxi Chemical Industry
作者简介
徐玮,女,1986年出生,毕业于武汉工程大学,硕士学位,工程师,主要研究方向为磷化工。
