Detection method for tea seed oil adulteration based on ratio of main fatty acids

A detection method, tea seed oil technology, applied in measuring devices, instruments, scientific instruments, etc., can solve problems such as difficult analysis, poor versatility of measurement results, and adulteration of edible vegetable oils

Inactive Publication Date: 2012-12-26
HUNAN AGRICULTURAL UNIV
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Problems solved by technology

Due to the many types and complex categories of oil adulteration, it brings difficulties to the analysis and inspection of oil adulteration, which is mainly reflected in the following aspects: ①There are many types of oil products, and dozens of them have commercial value; ②Oil composition and structure The characteristics are greatly affected by regions, environments, varieties, etc., especially in the past ten years, the variety improvement work has developed rapidly, and the oil composition of new varieties of the same type is quite dif...

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  • Detection method for tea seed oil adulteration based on ratio of main fatty acids
  • Detection method for tea seed oil adulteration based on ratio of main fatty acids

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[0015] Collect 16 tea seed oil pure oil samples from different producing areas such as Hunan, Hubei, Jiangxi, etc., choose a pure tea seed oil sample for adulteration sample design (that is, pure tea seed oil is mixed with 5%, 15%, 25%, 50% volume ratio of peanut oil, soybean oil, rapeseed oil, cottonseed oil); the above-mentioned tea seed oil pure oil sample and the adulterated oil sample were subjected to methyl esterification treatment according to the aforementioned methyl esterification treatment method, The original fatty acid fingerprints of these tea seed oil pure oil samples and adulterated tea seed oil samples were collected by gas chromatography and mass spectrometry (analysis conditions were the same as before); the collected original fatty acid fingerprints were quantified by normalized area method. For fatty acids, calculate the ratios of methyl palmitate / methyl stearate and methyl cis oleate / methyl cis linoleate, see Table 1 below. Then according to the ratio of...

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Abstract

A detection method for tea seed oil adulteration based on ratio of main fatty acids obtains the contents of main fatty acids in pure tea seed oil and adulterated tea seed oil samples by applying gas chromatography and mass spectrometry technology (GC-MS technology), and intuitively presents the distribution characteristic of fatty acids of grease-adulterated pure tea oil by adopting a two-dimensional diagram of methyl cis-oleate/methyl cis-linoleate and methyl palmitate/methyl stearate, so as to qualitatively identify adulteration of tea oil.

Description

technical field [0001] The invention relates to the technical field of food detection, in particular to a method for detecting adulteration of tea seed oil based on the ratio of main fatty acids. Background technique [0002] Edible vegetable oil is not only an important source of energy and nutrition for the human body, but also an important basic raw material for the food industry. The edible vegetable oils currently on the market mainly include soybean oil, rapeseed oil, camellia oil, peanut oil, palm oil, rice bran oil, etc. Due to the different types of edible vegetable oils, the nutritional value and the uneven distribution of oil, the prices of different edible vegetable oils vary greatly. In order to obtain huge profits, some producers and operators mix cheap vegetable oils with high-priced vegetable oils, such as mixing rapeseed oil, cottonseed oil, soybean oil, and sunflower oil with sesame oil; mixing palm oil and cottonseed oil with vegetable oil; mixing olive o...

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Application Information

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IPC IPC(8): G01N30/88G01N30/86G01N30/06
Inventor 吴卫国彭思敏唐芳
Owner HUNAN AGRICULTURAL UNIV
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