盐酸总酸度测定时铁离子掩蔽剂的选择  

SELECTION OF IRON ION MASKING AGENT FOR DETERMINATIONOF TOTAL ACIDITY OF HYDROCHLORIC ACID

作　　者：赵小龙 吉晓超 杨燕 Zhao Xiaolong;Ji Xiaochao;Yang Yan(Xinjiang Zhongtai Xinxin Chemical Technology Co.,Ltd.,Urumqi 831500,Xinjiang,China)

机构地区：[1]新疆中泰新鑫化工科技股份有限公司,新疆乌鲁木齐831500

出　　处：《精细石油化工》2022年第6期72-74,共3页Speciality Petrochemicals

摘　　要：建立了盐酸总酸度测定的新方法,在盐酸中加入三乙醇胺掩蔽铁离子,以甲基橙为指示剂,测定盐酸中总酸度时,滴定终点颜色变化敏锐,可有效减小滴定体积误差、提高总酸度测定准确度。实验方法相对标准偏差小于0.08%,相对误差小于2.0%。When triethanolamine is added to hydrochloric acid to mask iron ion and methyl orange as indicator,the color change of titration end point is sharp,which can effectively reduce the error of titration volume and improve the accuracy of determination of total acidity.The relative standard deviation is less than 0.08%and the relative error is less than 2.0%.

关 键 词：掩蔽剂 三乙醇胺 滴定终点 

分 类 号：TE39[石油与天然气工程—油气田开发工程] O647.2[理学—物理化学]