Objective To establish a method for the identification of morpholine in morpholine fatty acid salt fruit wax by gas chromatography. Methods Morpholine fatty acid salt was hydrolyzed to morpholine using hydrochloric acid solution, and the pH of the solution was adjusted with sodium hydroxide acid solution. Detection was performed using gas chromatography-hydrogen flame ionization detector. Results The matrix effect of the method was 96.67%; there was no interference from sample blanks, reagent blanks, and standard solution blanks on the qualitative analysis of the target substance; the deviation of peak area for samples of different concentrations within 48 hours was within ±5%. The method was used to analyze the actual commercial samples, and 12 batches of samples were detected morpholine. Conclusion This method has the advantages of minimal interference, strong specificity, and good repeatability. The pretreatment process is simple and environmentally friendly, providing technical support for the identification of morpholine in morpholine fatty acid salt fruit wax.
| 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 |