In general, using infrared spectral characteristic absorption as a sample, a pattern of pattern, frequency and transmittance will be obtained, and then the composition of the measured substance can be found by comparing the pattern with the standard library. Therefore, if there is no standard map, there is no way to know what the measured substance is.

The standard gallery is very expensive, and our teacher said that 1 can be sold abroad for 2 yuan.

Therefore, it is suggested that if you want to do any testing, you'd better go to a professional testing center.

If you are in Wuhan, you can go to the Material Testing Center of Wuhan University of Technology. There are 70,000 maps here, very many. Hehe, this is the harvest of my experiments in the testing center these days.