Table 1.
Retention times of common impurities in technical-grade ethanol.
| Compound | Retention Time (min) | Limit of Detection (LOD; µL·L−1) |
Limit of Quantification (LOQ; µL·L−1) |
|---|---|---|---|
| Acetaldehyde | 0.86 | 0.15 | 0.46 |
| Methanol | 0.91 | 0.14 | 0.44 |
| Ethanol | 1.40 | 0.15 | 0.56 |
| 1-Propanol | 2.35 | 0.34 | 1.02 |
| Ethyl acetate | 2.89 | 0.47 | 1.43 |
| Isobutanol | 3.90 | 0.37 | 0.85 |
| 1-Butanol | 5.60 | 0.42 | 1.28 |
| Acetal | 6.00 | 0.55 | 1.66 |
| Glycerol | 10.70 | 0.13 | 0.39 |
| 4-Methyl-2-pentanol 1 | 7.0 | ||
| 3-Pentanol 2 | 5.25 |
1 Recover standard for gelled alcohol-based hand rubs (ABHRs) and internal standard for liquid ABHRs; 2 internal standard for gelled ABHRs.