Table 2.
Concentration of As species (mean ± standard deviation(mg/kg)) in Mid-Atlantic vent organisms
| Site | species | n | As Total (mg/kg) | Extraction efficiency | Extractable As identifieda | AB (mg/kg) | DMA (mg/kg) | As(III) (mg/kg) | As(V) (mg/kg) | Oxo-As-SugPO4 (mg/kg) | Thio-As-SugPO4 (mg/kg)b | Unknown cation (mg/kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
| ||||||||||||
| Rainbow | R.exoculata | 1 | 3.9 | 39% | 93% | 1.2 | <0.004 | <0.002 | 0.2 | <0.007 | <0.007 | <0.001 |
| TAG | R.exoculata | 3 | 29.8 ± 3.9 | 67 ± 3% | 98% | 14.0 ± 1.3 | <0.004 | <0.002 | 5.5 ± 3.5 | <0.007 | <0.007 | <0.001 |
| Rainbow | B. azoricus | 3 | 9.9 ± 1.7 | 67 ± 3% | 19% | 0.3 ± 0.1 | 0.05 ± 0.01 | 0.31 ± 0.26 | 0.3 ± 0.1 | 0.4 ± 0.1 | n/a | 0.3 ± 0.2 |
| Lucky Strike | B. azoricus | 12 | 11.6 ± 2.4 | 70 ± 9% | 33% | 0.5 ± 0.3 | 0.05 ± 0.03 | 0.55 ± 0.18 | 0.6 ± 0.5 | 0.9 ± 0.8 | 1.5 ± 1 | 0.4 ± 0.3 |
| Lucky Strike | B. seepensis | 4a | 16.9 ± 2.3 | 89 ± 6% | 85% | 1.9 ± 0.6 | 0.37 ± 0.17 | 2.4 ± 0.5 | 1.8 ± 0.6 | 6.9 ± 1.5 | <0.007 | 2.1 ± 0.5 |
a
% of extracted species; column recoveries were 24–96% for anionic species and 14–103% for cationic species (see Accessory Publications)
b
Each sample was a composite of 2 organisms.
c
A subset of samples were analyzed for thio-As-SugPO4: R. exoculata (Rainbow n=1; TAG n=1); B. Azoricus (Lucky Strike n=4), B. Seepensis (Lucky Strike n=2).
n/a = not available