Samples Acid Peak% Main Peak% Basic Peak%
Criteria ≤ 42.0 ≥ 45.0 ≤ 18.0
Positive control 22.83 74.69 2.48
12-h light treatment 24.17 72.86 2.97
24-h light treatment 24.79 72.18 3.03
48-h light treatment 25.24 71.45 3.31
96-h light treatment 26.74 66.16 7.10
12-h heat treatment 28.88 66.83 4.29
24-h heat treatment 33.12 61.91 4.97
48-h heat treatment 40.29 54.07 5.44
96-h heat treatment 57.89 36.45 5.66