Table 3.
Chromium content (ppm) after the different experimental time intervals.
| Chromium release(PPM) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 7 days | 14 days | 21 days | Total | ||||||||
| GN | 0.50 ± 0.11 | a | AB | 1.03 ± 0.01 | b | A | 1.68 ± 0.03 | c | A | 3.21 ± 0.12 | AB |
| GE | 0.89 ± 0.10 | a | C | 1.29 ± 0.02 | b | B | 1.95 ± 0.03 | c | B | 4.13 ± 0.10 | C |
| VE | 1.15 ± 0.02 | a | D | 1.03 ± 0.05 | b | A | 1.95 ± 0.06 | c | B | 4.13 ± 0.11 | C |
| SCs | 0.45 ± 0.01 | a | A | 0.30 ± 0.03 | a | C | 2.05 ± 0.35 | b | AB | 2.81 ± 0.33 | D |
| INs | 0.76 ± 0.02 | a | C | 1.03 ± 0.08 | b | A | 1.42 ± 0.02 | c | C | 3.21 ± 0.09 | A |
| ECs | 0.63 ± 0.02 | a | B | 1.55 ± 0.03 | b | D | 1.16 ± 0.03 | c | D | 3.34 ± 0.05 | B |
Identical letters indicate no statistical difference (p > 0.05). Intragroup significance - Comparison of the different time intervals in each group with ANOVA test and Tukey post hoc-test. Intergroup Significance - Comparison among the groups in each time interval with Kruskal-Wallis test and Wilcoxon post hoc-test