应用乙氧基在960厘米~（-1）处的吸收,建立了硅油中乙氧基的红外光谱定量测定方法,方法的灵敏度为0.1％,精确度为0.015％。 硅油中苯基含量可以应用紫外光谱法测定,精确度为0.53％,也可以由其中硅元素含量测得,两种方法所得结果无显著差异。应用紫外光谱法同时可以定量测定两种不同类型结构及在甲基苯基硅油中的相对含量。 The absorption of ethoxy group at 960 cm ~ (-1) was used to establish a quantitative method for the determination of ethoxy group in silicone oil. The method has a sensitivity of 0.1% and a precision of 0.015%. The phenyl content of silicone oil can be determined by UV spectrophotometry, with an accuracy of 0.53%, which can also be determined by the content of silicon element. There is no significant difference between the two methods. The simultaneous determination of the relative contents of two different types of structures and in methylphenyl silicone oil by UV spectroscopy can be quantitatively determined.