Research Article
Characterization of Functionalized Polyurethane Foam for Lead Ion Removal from Water
Table 2
Retention times of foam samples.
| Sample | Peak retention time (mins) |
| A1 | 11.4 | | | | | A2 | 9.5 | 11.3 | | | | A3 | 8.6 | 11.1 | 11.6 | | | A4 | 7.7 | 11.0 | 11.7 | 13.7 | 14.6 | B7 | 9.2 | 11.4 | | | | C9 | 9.4 | 11.0 | 11.4 | 13.9 | | C10 | 9.4 | 9.7 | 10.6 | 11.7 | 15.3 |
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