Fig. 1. Experimental setup diagram of micro confocal Raman spectroscopy system

Fig. 2. Simulated Raman spectra of two glucopyranoses. (a) α-D-glucopyranose; (b) β-D-glucopyranose

Fig. 3. Raman spectra of glucose solution with different mass concentrations

Fig. 4. Spectra of glucose solution normalized with water as internal standard

Fig. 5. Linear relationship between glucose solution mass concentration and relative intensity of characteristic peaks

Fig. 6. Linear relationship between glucose solution mass concentration and relative area of characteristic peaks