Compared with Figure 2, there may be a confusion. 4 hours before drying, the mass loss of the specimen increases (Figure 2), but the total signal volume is almost unchanged. So where did the lost water go?
Compared to Figure 2, there may be a confusion, 4 hours before drying, the quality loss of the test piece increased (Figure 2), but the total semagram is almost unchanged, so where is the lost water?