六甲基二硅醚溶液标准物质的研制

Development of hexamethyldisilane solution reference material

研制了六甲基二硅醚溶液标准物质。首先采用杂质扣除法对六甲基二硅醚高纯品的纯度进行定值,然后采用重量法对六甲基二硅醚溶液标准物质进行定值,用气相色谱外标法对定值结果进行验证。对定值结果的不确定度进行评定,计算了定值结果的合成不确定度和扩展不确定度。六甲基二硅醚溶液标准物质的含量定值结果为0.102%,相对扩展不确定度为U=2%(k=2)。

The hexamethyldisilane reference material was developed.The purity of hexamethyldisilane sample was determined through impurity deduction,and the mass balance method was used to determine the content of the hexamethyldisilane standard substance,the calibration results were verified by gas chromatography.The uncertainty in the determination process was evaluated,the synthesis uncertainty and extended uncertainty of the definite result were calculated.The content of the reference material of hexamethyldisilane was 0.102%and the extended uncertainty was 2%(k=2).