To study Maillard reactions during drying process, filter paper was used as the model substrate to soak fructose-proline solutions and used as test samples. The fructose-proline containing paper sample was dried at different temperatures for different periods. The absorbance at 420 nm(A_(420nm)) of the extract was detected to analyze the browning intensity, in addition GC/MS was used to detect the volatile compounds and HPLC-MS/MS was used to detect the content of Heyns compounds. The results showed that: 1...