Research Article
A Rapid Screening Method for Sibutramine Hydrochloride in Natural Herbal Medicines and Dietary Supplements
Table 1
The results of partition coefficients.
| System | Sample | Peak area | CA or CB (μg/ml) | Partition coefficients K | K (avg.) | R.S.D. % (n = 3) |
| 1 | B | 13958213 | 340.89 | 36.62 | 36.72 | 1.31 | A | 383660 | 9.31 | B | 13936925 | 340.37 | 36.29 | A | 386525 | 9.38 | B | 14138345 | 345.29 | 37.24 | A | 382022 | 9.27 |
| 2 | B | 13961488 | 340.97 | 42.00 | 40.37 | 3.51 | A | 334942 | 8.12 | B | 14056876 | 343.30 | 39.64 | A | 357049 | 8.66 | B | 14024944 | 342.52 | 39.47 | A | 357868 | 8.68 |
| 3 | B | 14275491 | 348.64 | 45.18 | 46.70 | 3.18 | A | 318567 | 7.72 | B | 14247243 | 347.95 | 48.14 | A | 298507 | 7.23 | B | 14171506 | 346.10 | 46.77 | A | 305466 | 7.40 |
| 4 | B | 14118285 | 344.80 | 46.67 | 47.04 | 2.78 | A | 305057 | 7.39 | B | 14198116 | 346.75 | 48.50 | A | 295231 | 7.15 | B | 14093721 | 344.20 | 45.96 | A | 309151 | 7.49 |
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System 1: ethyl acetate/0.5% phosphoric acid; 2: ethyl acetate/1.0% phosphoric acid; 3: ethyl acetate/3.0% phosphoric acid; 4: ethyl acetate/5.0% phosphoric acid; AC: the organic phase; and BC: the aqueous phase. |