Table 2 Spectral peaks with assignment of their corresponding biochemical components.

From: A novel fast method for identifying the origin of Maojian using NIR spectroscopy with deep learning algorithms

Wavenumber (cm−1)

Assignment

4258

C–H stretching

4404

C–H, N–N, O–H

4666

C–H stretching

5191

C=O stretching

5781

First overtone of the C–H stretching

6884

C–H stretching

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