Table 8
PPR changes over time. Sample S1 (HPAM/PEI gel system with 15 000 ppm HPAM and 8000 ppm PEI); Sample S3 (HPAM/PEI gel system with 7000 ppm HPAM and 4000 ppm PEI).
Time (days) | PPR |
|
---|---|---|
S1 | S3 | |
1 | 94.82 | 99.24 |
7 | 75.45 | 97.42 |
30 | – | 97.29 |