Table 2. Ratios of peaks assigned to nickel and organically bound nickel.
| Sample | Ni (divided by total ion) | NiC2N2/FeC2N2 |
|---|---|---|
| Scale 1 | 0.00080 | 0.84 |
| Reddish white-brown sediment | 0.00040 | 0.27 |
| Mosquito | 0.00007 | 0.02 |
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