Table 2. Blank Standard Addition Recovery of Experimental Methoda.
| no. | prepared concentration (μg/mL) | analyzed concentration (μg/mL) | no. | analyzed concentration (μg/mL) | recovery (%) |
|---|---|---|---|---|---|
| A | 5.76 | 5.88 | C | 1.54 | 26.7 |
| 5.88 | 1.59 | 27.6 | |||
| 5.83 | 1.56 | 27.1 | |||
| B | 5.87 | 5.89 | D | 1.21 | 20.6 |
| 5.91 | 1.20 | 20.4 | |||
| 5.79 | 1.17 | 19.9 |
a
Note: A, B, C, and D represent commercial standard solution of free nicotine dissolved in cyclohexane, pure nicotine dissolved in cyclohexane, solution A washed by deionized water, and solution B washed by deionized water, respectively.