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| ICP MS | |
| RF power | 1550 W |
| Ar flow rate | Plasma gas: 15 L min-1 |
| Nebulizer: 1 L min-1 | |
| Isotope monitored | 75 As |
| Integration time | 0.1 s (spectrum) per point |
| Points per peak | 3 |
| HPLC | |
| Column | PRP-X100 anion Exchange |
| Dimensions: 250 mm×4.1 mm, particle size 10 µm | |
| Guard column | PRP-X100 anion exchange |
| Dimensions: 4.6 mm | |
| Mobile phase | 10 mM HPO4 −2/H2PO4 −; 2% (v/v) MeOH; pH 8.5 |
| 100 µL | |
| Flow rate | 1.5 mL min-1 |
| Mode | Isocratic |
