Full
Outline
To establish a QuEChERS-gas chromatography-mass spectrometry method for the simultaneous determination of seven parabens in beef tallow hotpot seasoning.
To an accurately weighed quantity of the homogenized sample, water, the internal standard and acetronitrile were added, and the analytes were extracted and purified by QuEChERS, analyzed by gas chromatography-mass spectrometry and quantified by internal standard method.
Good linearity was observed for all seven analytes over the range of 0.05 to 5.00 μg/mL, with r≥0.999. The limits of detection (LODs) were between 0.05 and 0.06 mg/kg, and the limits of quantitation (LOQs) were between 0.15 and 0.20 mg/kg.The average recoveries of the method were between 91.4% and 108%, with the relative standard deviations (RSDs) between 0.6% and 7.2%.
The method is simple, accurate and sensitive, and is suitable for the simultaneous determination of seven parabens in beef tallow hotpot seasoning.
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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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