Full
Outline
To establish a method for the determination of dilauryl thiodipropionate (DLTP) in foods by gas chromatography-tandem mass spectrometry (GC-MS/MS).
Samples were extracted with acetonitrile. For lipid-rich samples, a solvent system composed of hexane-saturated acetonitrile was employed for defatting and purification. The resulting extract was then subjected to centrifugation, dehydration and filtration through a microporous membrane to complete sample preparation. The established GC-MS/MS method, combined with an external standard calibration approach, was applied to determine DLTP in various food matrices, including fruits, vegetables, puffed foods, fried nuts and seeds and fried flour-based products.
DLTP exhibited good linearity in the mass concentration range of 0.1–2.0 mg/L, with correlation coefficients all greater than or equal to 0.996. At different matrixes and different spiked concentration levels, the method demonstrated recoveries ranging from 81.8% to 107.8%, with relative standard deviations of 0.59%–5.75% (n=6). The limit of detection was 0.3 mg/kg, and the limit of quantitation was 1.0 mg/kg.
The developed method is simple to perform, accurate and exhibits satisfactory sensitivity. It is suitable for the quantitative determination of DLTP in foods and can provide reliable technical support for the safe use and regulatory oversight of this food additive.
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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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