摘要
建立了以草酸钾-氯化镁为掩蔽剂、以滴定法测定高浓度硝酸铀酰溶液酸度的方法,考察了掩蔽剂用量、指示剂种类对测定结果的影响。结果表明:以草酸钾-氯化镁为掩蔽剂,测定结果可靠;当草酸钾(50 g/L)用量10 mL、氯化镁(50 g/L)用量15 mL、以甲基红-溴甲酚绿为指示剂时,方法加标回收率为97%~102%,2个实际样品的测定结果相对标准偏差分别为0.81%、1.57%(n=6)。方法测定结果与自动电位滴定法测定结果一致,测定下限为0.01 mol/L,适合测定高浓度硝酸铀酰溶液酸度。
A titration method for determination of uranyl nitrate solution acidity was established using K2C2O4-MgCl2 as masking reagents.The effects of masking reagents amount and indicators on determination were examined.The results show that using K2C2O4-MgCl2 as masking reagents and methyl red-bromocresol green as indicators,the adding standard recovery is 97%~102%,RSD is 0.81%and 1.57%for two real samples(n=6)when K2C2O4 solution(50 g/L)and MgCl2 solution(50 g/L)dosage are 10,15 mL,respectively.The results is in accordance with that of automatic potentiometric titration.The method detection limit is 0.01 mol/L,the determination results are accurate and reliable,and can be applied in determining the acidity of high concentrated uranyl nitrate solutions.
作者
郭国龙
卢阳
龚明明
应长帅
杜凯华
GUO Guolong;LU Yang;GONG Mingming;YING Changshuai;DU Kaihua(Beijing Research Institute of Chemical Engineering and Methallurgy,CNNC,Beijing 101149,China)
出处
《湿法冶金》
CAS
北大核心
2021年第1期86-89,共4页
Hydrometallurgy of China
关键词
硝酸铀酰
酸度
掩蔽剂
滴定
uranyl nitrate
acidity
masking reagent
titration
