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To establish a high-performance liquid chromatography (HPLC) method for investigating the extraction of common antioxidants and extractable sulfur in medical rubber stoppers and the migration of antioxidants and extractable sulfur to propofol medium/long chain fat emulsion injection.
Waters Symmetry RP18(250 mm×4.6 mm，5 μm) was used as chromatographic column with methanol-acetonitrile -1% acetic acid solution as the mobile phase. Detection wavelength, velocity of flow and column temperature were set to 277 nm, 1 mL·min-1 and 35 ℃.
Good resolution and linear relationship (r≥0.999 6) in the range of 0.1-20 μg·mL-1 were achieved. This method possesses superior precision, stability, repeatability, and all RSD were less than 5%. The rate of recovery was 93.3%-108.7%, and the RSD was 1.8%-12.5%. The migration of antioxidant BHT was detected in three batches of solution and the content was higher than its corresponding permitted daily exposure (PDE) value, which means there is a large safetyrisk.
The method represents high sensitivity and is easy to operate, which can effectively detect the migration of antioxidants in propofol medium/long chain fat emulsion injection.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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