Table 1.
Operating conditions for the HPLC and ICP-DRC-MS
| High-performance liquid chromatography | |
|---|---|
| Solvent A |
6 mM Ammonium cabonate |
| Solvent |
20 mM Ammonium phosphate, monobasic |
| Flow Rate |
1.2 mL/min |
| Column |
Anion Exchange, Hamilton PRP-X100, 4.6 mm I.d. × 150 mm, 5 μm |
| Guard column |
2.3 × 30 mm PRP-X100TM |
| Autosampler flush solvent |
5% Methanol |
| Sample injection volume |
50 μL |
|
Inductively coupled plasma- dynamic Reaction Cell- mass | |
|
spectrometry (ICP-DRC-MS) | |
| RF Power |
1400 W |
| Monitored Ion m/z |
91 (75As16O) for DRC |
| Detector mode |
Dual |
| Measurement uints |
Cps |
| Autolens |
On |
| Sample units |
μg/L |
| Dwell time |
250 ms |
| Cell gas |
High purity O2 Gas |
| Cell gas flow rate |
0.50 mL/min |
| RPQ | 0.45 |