付里叶变换红外光声光谱(FTIR—PAS)技术是七十年代末发展起来的一种新的红外光谱测定技术。它具有较高的检测灵敏度,不受散射光的影响,能直接地反映出试样对不同波长的入射电磁能量的吸收特性。测定时不要求对样品作任何加工处理,因此对于那些难以透射法测定的样品(如纤维、橡胶、泡沫塑料、油漆涂膜、煤、生物样品等等),用红外光声光谱法测定是一种非常好的方法。正因为付里叶变换光声光谱具有这 Fourier Transform Infrared Photoacoustic Spectroscopy (FTIR-PAS) is a new infrared spectrometry developed in the late seventies. It has high detection sensitivity, not affected by the scattered light, which can directly reflect the sample’s absorption characteristics of different wavelengths of incident electromagnetic energy. The determination of the sample does not require any processing, so for those difficult to determine the transmittance of the sample (such as fiber, rubber, foam, paint coating, coal, biological samples, etc.), measured by infrared spectroscopy is a Kind of very good method. It is precisely because Fourier transform photoacoustic spectroscopy has this