The results of elemental analysis of the samples.
| Sample | C (%) | H (%) | N (%) | S (%) | Fea (%) |
|---|---|---|---|---|---|
| MC | 37.77 | 5.77 | — | — | 23 |
| MC–SO3H | 30.64 | 4.74 | — | 1.93 | 20 |
a
Estimated by ICP-OES.
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