Table 3. Change of ζ-Potential Values of Chickpea Protein Isolates with pH.
| ζ-potential
(mV) | |||||
|---|---|---|---|---|---|
| pH | Hisar | Erzincan | Black chickpea | Azkan | Yasa |
| 2.0 | 16.2 ± 0.2ea | 18.8 ± 0.3d | 26.1 ± 0.8b | 29.1 ± 0.5a | 20.8 ± 0.7c |
| 3.0 | 21.7 ± 0.2c | 28.5 ± 0.8a | 29.0 ± 0.5a | 25.0 ± 0.2b | 25.5 ± 0.2b |
| 4.0 | 15.3 ± 0.4a | 11.1 ± 0.2c | 12.1 ± 0.3c | 11.8 ± 0.1c | 14.0 ± 0.6b |
| 5.0 | –4.6 ± 0.2a | –10.1 ± 0.5c | –13.6 ± 0.3d | –4.6 ± 0.0a | –7.6 ± 0.3b |
| 6.0 | –13.8 ± 0.2a | –17.7 ± 0.7b | –26.4 ± 2.0c | –14.5 ± 0.1a | –15.1 ± 0.3ab |
| 7.0 | –17.7 ± 0.3a | –22.9 ± 0.5b | –32.5 ± 1.6c | –18.9 ± 0.6a | –22.5 ± 0.3b |
| 8.0 | –19.8 ± 0.7a | –26.5 ± 0.5b | –32.6 ± 0.5c | –25.5 ± 0.1b | –24.7 ± 1.0b |
| 9.0 | –21.6 ± 0.4a | –27.0 ± 0.9b | –31.6 ± 0.8c | –23.5 ± 0.6a | –26.3 ± 0.6b |
| 10.0 | –23.6 ± 0.4a | –30.2 ± 0.8b | –33.9 ± 2.0c | –27.2 ± 0.2ab | –28.0 ± 1.5b |
| pI | 4.9 ± 0.0a | 4.7 ± 0.0c | 4.6 ± 0.0d | 4.7 ± 0.0c | 4.8 ± 0.0b |
a
Data represent the mean ± SD (n = 3); mean values with different letters within the same row are significantly different.