紫外分光光度法测定端羟基环氧乙烷-四氢呋喃共聚醚中抗氧剂含量

Determination of antioxidant content in hydroxyl-terminated ethylene oxidetetrahydrofuran copolyether using ultraviolet spectrophotometry

采用紫外分光光度法测定了端羟基环氧乙烷-四氢呋喃共聚醚中抗氧剂的含量,测试条件为:检测波长282 nm,样品质量浓度4 mg/m L,放置时间5 min。其结果的相对标准偏差≤1.0%,极差≤0.002 0%。

The antioxidant content in the hydroxyl-terminated ethylene oxide-tetrahydrofuran copolyether was determined by using the ultraviolet spectrophotometry. The determination conditions are the test wavelength of 282 nm, the mass concentration of sample of 4 mg/mL, the placing time of 5 min. The relative standard deviation of the result is less than 1.0%, and the range is not more than 0.002 0%.