Research Article
Determination of Glycerin from a Marketed Personal Care Product Using Gas Chromatography
Table 2
System suitability, sensitivity, and precision study for the proposed method.
| Parameters | Glycerin |
| System suitability | | Retention time (min) | 6.05 ± 0.21 | Capacity factor | 3.89 | Resolution | 5.68 | USP tailing factor | 1.79 | USP theoretical plates () | 12461 | Sensitivity | | Limit of detection (LOD) (mg/mL) | 0.01 | Limit of quantitation (LOQ) (mg/mL) | 0.05 | Content of glycerin mL/100 mL (label claim = 10 mL/100 mL) | 9.62 ± 0.17 | Precision | | Intraday | | Repeatability (mg/100 mL) () ± %RSD | 9.63 ± 0.17 | Interday | | Mean resorcinol content from hair tonic preparation (mg/100 mL) (day 1/day 2/day 3) () | 9.61/9.64/9.59 | (%RSD) (day 1/day 2/day 3) () | 0.21/0.16/0.19 |
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