工业用碳酸二甲酯产品分析方法

Analytical Method ofindustrial DMC Product

在碳酸二甲酯产品组分含量的测定中,根据GB/T 33107—2016提供的组分测定方法,对于含量在80%左右的DMC产品,就不再适用其组分分析。文章论述了利用校正面积归一化法,将DMC的校正因子参与到DMC的纯度计算,甲醇测定方法由原标准中的外标法改为校正面积归一化法,有效地降低了方法误差,加标回收率在98.01%~99.38%之间,能够满足不同纯度DMC的分析要求。

In the determination of DMC products,according to the method provided by GBT 33107—2016,it is no longer suitable for the component analysis of the DMC products which containing about 80%.In this paper,the correction factor of DMC is involved in the purity calculation of DMC by using the correction area normalization method.The methanol determination method is changed from the external standard method in the original standard to the correction area normalization method,which effectively reduces the method error,the recovery of standard addition is between 98.01%and 99.38%,which can meet the analysis requirements of different purity dimethyl carbonate.