介绍了红外光谱经过处理 ,利用偏最小二乘法同时测定内燃机油中添加剂含量的方法 ,并对测定结果的准确性、可靠性进行了验证。这种方法便捷 ,准确度、精密度优于现行方法 ,可明显提高分析化验效率并降低检验成本 ,为生产监控和产品鉴别提供了强有力的手段。推广使用后效果显著。 The method of simultaneous determination of additive content in internal combustion engine oil by partial least squares method was introduced. The accuracy and reliability of the determination results were also verified. The convenience, accuracy and precision of this method are superior to the current methods, which can obviously improve the efficiency of analysis and test and reduce the inspection cost, which provides a powerful means for production monitoring and product identification. Promote the use of significant results.