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| Identification technology of adulteration of seven kinds of edible vegetable oils with cottonseed oil |
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| DOI：10.19902/j.cnki.zgyz.1003-7969.240264 |
| KeyWord:edible vegetable oil cottonseed oil adulteration identification characteristic fatty acid sterculic acid |
| FundProject:新疆维吾尔自治区市场监督管理局科技计划项目（S2023151011） |
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| Abstract: |
| To select a more suitable method for identifying adulterated cottonseed oil in edible vegetable oils, three methods (Halphen test based on physicochemical property analysis, fatty acid composition analysis, and specific marker sterculic acid determination) were used to identify adulterated cottonseed oil in seven kinds of edible vegetable oils from Xinjiang. The results showed that the Halphen test might have false negatives when determining whether edible vegetable oils were adulterated with cottonseed oil,and the test could only provide a simple qualitative judgment of cottonseed oil and could not determine the adulteration proportion of cottonseed oil through color intensity. For fatty acid composition analysis, different edible vegetable oils exhibited differences. Sunflower seed oil, rapeseed oil, and safflower seed oil could be identified by measuring changes in palmitic acid content in the oil sample, while flaxseed oil could be identified by measuring changes in linoleic acid content when the adulteration level of cottonseed oil was 10% or more in the oil sample. However, soybean oil and peanut oil did not achieve good results when determining adulteration levels within 20% through fatty acid content changes. The GC-MS method based on specific marker sterculic acid was accurate and reliable, and could effectively identify cottonseed oil with adulteration levels of 2% or more in edible vegetable oils. In summary, compared to the other two methods, the GC-MS method based on specific marker sterculic acid has certain advantages and is more suitable for identifying adulterated cottonseed oil in edible vegetable oils. |
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