滴定法测定三氧化硫三甲胺络合物的含量

Determination of the Content for Sulfur Trioxide Trimethylamine Complex by Titration

建立一种三氧化硫三甲胺络合物含量的测定方法。以过量的氢氧化钠溶液作为溶剂,以盐酸标准溶液(1.0 mol/L)作为滴定剂回滴过量的氢氧根离子,采用滴定法对三氧化硫三甲胺络合物作含量测定。三氧化硫三甲胺络合物含量平均为95.48%,样品量在0.201 2~0.602 1 g范围内线性关系良好,(r=0.999 9),线性方程:y=6.874 3x-0.00 20,平均回收率为100.43%,RSD=0.18%(n=9)。该方法操作简便、测定准确,可用于三氧化硫三甲胺络合物含量的测定。

To establish the method for the determination of the content of Sulfur trioxide trimethylamine complex.Excess sodium hydroxide solution was selected as the solvent,and 1.0 mol/L hydrochloric acid was selected as the standard solution to determine the content of Sulfur trioxide trimethylamine complex.The content of Sulfur trioxide trimethylamine complex was 95.48%.The complex was linear(r=0.9999)in the concentration of 0.2012-0.6021g,the linear equation was y=6.8743x-0.0020,and the average recovery was 100.43%with RSD was 0.18%(n=9).The method was easy to operate,reliable and accurate,which could be used in the determination of the content of Sulfur trioxide trimethylamine complex.