Table 2.
pH measurements obtained after adding distilled water, PBS or BHI to resins disks surfaces of R1-5.
| Solution | Resin | Measurement time | |||||
|---|---|---|---|---|---|---|---|
| T=0h | T=3h | T=6h | T=12h | T=24h | T=24h, after rinsing | ||
|
| |||||||
| H2O | R1 | 6.61(0.03)a | 6.77(0.14)a | 6.73(0.30)a | 6.67(0.04)a | 6.76(0,13)a | 6.60(0.04)a |
| R2 | 6.62(0.04)a | 6.31(0.09)b | 6.41(0.30)a | 6.53(0.03)a,b | 6.70(0.14)a,b | 6.62(0.04)a | |
| R3 | 6.66(0.02)a | 6.35(0.07)b | 6.42(0.36)a | 6.43(0.02)b,c | 6.50(0,11)b,c | 6.61(0.03)a | |
| R4 | 6.07(0.01)b | 6.06(0.04)b | 5.85(0.34)b | 6,32(0.05)c | 6.44(0.05)c | 6.55(0.04)a | |
| R5 | 3.23(0.14)c | 3.15(0.40)c | 3.05(0.22)c | 3,10(0,20)d | 3,21(0.21)d | 4.40(0.07)b | |
|
| |||||||
| PBS | R1 | 7.39(0.01)a,b | 7.39(0.01)a | 7.39(0.02)a | 7.34(0.01)a | 7.34(0.01)a | 7.38(0.01)a |
| R2 | 7.40(0.01)a | 7.40(0.00)a | 7.38(0.02)a | 7.33(0.01)a | 7.34(0.01)a | 7.40(0.01)a | |
| R3 | 7.40(0.00)a | 7.41(0.01)a | 7.37(0.02)a | 7.34(0.01)a | 7.35(0.01)a | 7.40(0.01)a | |
| R4 | 7.38(0.01)b | 7.41(0.01)a | 7.18(0.01)b | 7.23(0.01)b | 7.23(0.01)b | 7.39(0.01)a | |
| R5 | 6.96(0.01)c | 6.41(0.31)b | 4.04(0.20)c | 2.79(0.10)c | 2.72(0.11)c | 6.83(0.03)b | |
|
| |||||||
| BHI | R1 | 7.07(0.01)a | 7.10(0.01)a | 7.12(0.01)a,b | 7.15(0.01)a | 7.13(0.01)a | 7.08(0.01)a |
| R2 | 7.07(0.00)a | 7.11(0.00)a | 7.12(0.01)a,b | 7.16(0.01)a | 7.13(0.01)a | 7.10(0.01)a | |
| R3 | 7.07(0.01)a | 7.11(0.00)a | 7.13(0.01)a | 7.16(0.00)a | 7.13(0.00)a | 7.10(0.01)a | |
| R4 | 7.07(0.00)a | 7.11(0.00)a | 7.11(0.01)b | 7.13(0.02)a | 7.09(0.01)a | 7.09(0.01)a | |
| R5 | 6.90(0.02)b | 6.90(0.07)b | 6.02(0.03)c | 4.10(0.12)b | 4.02(0.13)b | 6.83(0.03)b | |
The first set of measurements was performed immediately after the rinsing procedure. After that, measurements were performed after 3h, 6h, 12h and 24h. The last set of measurements was performed after discarding the solutions, rinsing the resin disks three times with water then reinserting new solutions inside the wells. Results are listed as means and standard deviations (SD). Similar letters indicate no statistical significance for α = 0.05.