Table 2 Relevant FT-IR absorption bands and related absorbance ratios (other’s absorbance/1509 cm−1’s absorbance) of WPC
Band (cm−1) | AL-WPC | DA-WPC | LHW-WPC | AFEX-WPC |
|---|---|---|---|---|
Baseline corrected band intensities | ||||
 3300 | 0.69 | 0.81 | 0.80 | 0.45 |
 1662 | 0.38 | 0.44 | 0.60 | 1.00 |
 1579 | 1.77 | 1.69 | 2.00 | 1.21 |
 1509 | 1.00 | 1.00 | 1.00 | 1.00 |
 1404 | 1.54 | 1.56 | 1.50 | 1.00 |
 1253 | 0.77 | 0.75 | 1.00 | 0.90 |
 1168 | 0.54 | 1.19 | 0.70 | 0.79 |
 1126 | 1.00 | 2.00 | 1.00 | 0.76 |
 1028 | 1.46 | 1.13 | 1.30 | 0.86 |
 833 | 0.85 | 0.75 | 0.80 | 0.83 |