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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 content of antioxidants in the hydroxyl-terminated ethylene oxide-tetrahydrofuran copolyether was determined by UV spectrophotometry. The detection conditions were as follows: the detection wavelength was 282 nm, the concentration of the sample was 4 mg / m L and the storage time was 5 min. The results of the relative standard deviation ≤ 1.0%, very poor ≤ 0.002 0%.