Table 1.
Description of the chemical used (all purchased from Sigma-Aldrich). Purity (mass) as stated by the supplier.
| Chemical | CAS n° | Purification | Assay (mass) |
|---|---|---|---|
| Sodium chloride | 7647-14-5 | NO | ≥99% |
| Tetramethylammonium chloride | 75-57-0 | [36] | ≥99% |
| Tetraethylammonium iodide | 68-05-3 | [36] | 98% |
| Hydrochloric acid | 7647-01-0 | NO | ≥99% |
| Tetramethylammonium hydroxide | 10424-65-4 | NO | ~10%a |
| Tetraethylammonium hydroxide | 77-98-5 | NO | ~10%a |
| Sodium hydroxide | 1310-73-2 | NO | ≥99% |
| Potassium phthalate monobasic | 877-24-7 | NO | ≥99.95% |
| Sodium carbonate | 497-19-8 | NO | 99.995% |
| Calcium chloride dihydrate | 10035-04-8 | NO | ≥99% |
| Magnesium chloride hexahydrate | 7791-18-6 | NO | ≥99% |
| Zinc chloride anhydrous | 7646-85-7 | NO | ≥98% |
| N-acetyl-L-cysteine | 616-91-1 | NO | ≥99% |
a
Value refers to the concentration in the solutions. On the dry basis, their assay is ≥99.5% (mass).