摘要
本文用络合滴定法对钛酸钡中的钡和钛分别进行了测定。样品用盐酸溶解后,首先加入稀硫酸沉淀钡为硫酸钡,而后把其溶于EDTA-碱性溶液中,用Mg^(2+)滴定过量的EDTA,可求出钡的含量;把沉淀出钡后的滤液调pH到5.5,加入过量EDTA,以二甲酚橙为指示剂,用硝酸铅溶液返滴过量EDTA,可求得钛的含量。该法与传统测试方法相比,有快速、简便、准确的特点。
Barium and titanium in barium titanate were determined by means of complexometric titration. Dissolve 0.25g BaTiO3 in 15ml concentrated hydrochloric acid and dillute to 30ml .with water. Then, dilute sulfuric acid was added. The barium sulphate precipitated was redissolved in excess of 0.05mol/ L EDTA solution, add a few drops of Erio T as indicator and titrute with standard 0.02mol / L MgCl2 solutim.
A djust the pH of filtrate to 5.5, excess of 0.05mol / L EDTA was added and xylenol orange was used as indicator. Then, titrate the filtrate with standard 0.02mol / L lead nitrate solution until the colour changes from orange to red.
出处
《河北大学学报（自然科学版）》
CAS
1993年第3期77-81,共5页
Journal of Hebei University(Natural Science Edition)
关键词
钡
钛
钛酸钡
测定
络合滴定
Determination Titunate Burium Titanium
