提出了一种在校正模型不确定时分析体系的光谱多元分析方法,首先构造投影阵以检验校正模型的合理性,通过检验可以发现分析体系是否含有其它不纯物,继用不纯物在投影空间中的矢量与可能存在物质的投影光谱进行检索比较,检出不纯物并测出各组份含量.将此法应用于3个分析体系,获得满意的结果. A spectral multi-analysis method is proposed to analyze the system when the calibration model is uncertain. First, the projection matrix is ​​constructed to test the rationality of the calibration model. Through the test, it can be found whether the analysis system contains other impurities. The vectors in space were compared with the projection spectra of possible substances, and the impurities were detected and the content of each component was measured. This method was applied to three analytical systems to obtain satisfactory results.