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利用红外光谱法测定了ＰＥ、ＥＶＡ塑料中光稳定剂（ＢＡＳＦ５０５０）的含量。试验中采用外标法，即制备标准样品，根据浓度曲线确定工艺样品中光稳定剂的含量，结果表明标准曲线线性关系良好，相关系数达到０．９９８，回收试验数据表明回收率平均在１００％±２０％以内。此法可以用于塑料及其它聚合物中添加剂测定的中控方法。
The content of light stabilizer (BASF5050) in PE and EVA plastic was determined by infrared spectroscopy. The external standard method was used to prepare the standard sample. The content of light stabilizer in the process sample was determined according to the concentration curve. The results showed that the standard curve had a good linearity with a correlation coefficient of 0.998. The recovery test data showed that the average recovery was 100% Within ± 20%. This method can be used in plastic and other polymer additives in the determination of the control method.