Full
Outline
To establish a method for the determination of sec-butylamine residues in fruits and vegetables by gas chromatographic.
The sample was shaken in acidic solution, capped and heated at 60 ℃for 40 min. The sec-butylamine in the sample would diffuse into the gas phase in the closed container’s acidic solution. The content of sec-butylamine in the upper gas phase was determined by gas chromatography, and quantified by external standard method.
Sec-butylamine showed good linearity in the range of 0.1–2.0 mg/L, and the correlation coefficient (r2) was over 0.99. The limit of detection and limit of quantitation were 0.05 mg/kg and 0.1 mg/kg, respectively. Recoveries ranged from 84.1% to 91.8% with relative standard deviations less than 15%.
This method is simple to operate, has a fast analysis speed, high sensitivity, good repeatability and accurate results. It can be used for the determination of isobutylamine residues in fruits and vegetables.
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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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