Objective To establish a method for determination of 2 kinds of new carbadenafil analogue in tablet candies and solid beverages by high performance liquid chromatography. Methods The sample was extracted by methanol ultrasound, the extract was centrifuged, filtered through a microporous membrane, and analyzed by the high performance liquid chromatography. The separation was performed on a Waters Xbridge C18 column (250 mm×4.6 mm, 5 μm) with gradient elution by using 20 mmol/L ammonium acetate aqueous solution and methanol as the mobile phase, and quantified by external standard method. Results The 2 kinds of new carbadenafil analogue demonstrated good linearity in the range of 0.5-100.0 μg/mL, with the correlation coefficient values (r2) being higher than 0.999. The limits of quantification were found to be 5 mg/kg. The recoveries at 3 spiked levels of 1, 2 and 10 times the limits of quantification in blank matrix were in the range of 87.32%-93.92%, with the relative standard deviations between 1.19%-4.08%. A total of 8 batches of positive samples were detected using this method, with a content range of 218-2170 mg/kg. Conclusion The method is convenient, accurate and efficient. It can meet the identification requirement of illegally added 2 kinds of new carbadenafil analogue in tablet candies and solid beverages, and provide effective technical support to combat the illegal addition of new carbadenafil analogue in food.
| 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 |