Method for evaluating safety of edible oil by using zebra fish
A technology for edible oil and zebrafish, which is applied in the direction of testing food, material inspection products, etc., can solve problems such as unknown physical and chemical properties, oil oxidation, and difficulty in detection, and achieve scientific and reasonable detection methods, high detection accuracy, and reduced detection costs. Effect
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Embodiment 1
[0053] The investigation of embodiment 1 pretreatment method
[0054] This example compares the chemical extraction method, enzymatic hydrolysis method, and enzymolysis-chemical extraction method. It is found that the enzymatic hydrolysis method can degrade lipids into fatty acids, which has a great impact on the living environment of zebrafish, and introduces lipase and other protein substance. In addition, due to the extremely high lipid content in the edible oil, enzymatic hydrolysis is very difficult and the cost is very high. However, there is no significant difference in the extraction rate between the enzymatic hydrolysis-chemical extraction method and the chemical extraction method. In conclusion, choosing the chemical extraction method to pre-treat edible oil can not only reduce the cost, but also improve the time efficiency.
[0055] The comparison results of the three pretreatment methods are shown in Table 1:
[0056] Table 1 Comparison of three edible oil pretre...
Embodiment 2
[0059] The investigation of embodiment 2 extraction solvent
[0060] Compare the extraction rates of methanol, acetonitrile, DMSO, acetone and tetrahydrofuran, and their mixtures of 10%-100% to edible oils, use kitchen waste oils and self-made positive samples with known residues to analyze the extraction rate, positive addition The main substances are solvent residues, pollutants, antioxidants and heavy metal salts. The comparison results show that the extraction rate of acetonitrile: DMSO: water is 1.5: 1: 1 and the extraction rate is the best after three times of extraction. The extraction rate of various substances can reach 70%- 85%. The extract was dried, and the drying method was mainly drying at 55°C and nitrogen blowing at 55°C. After drying, the optimal constant volume solution is 70% methanol, and the considerations are the toxicity of the organic solvent to the zebrafish and the solubility of the organic solvent aqueous solution to the extract. The experimental r...
Embodiment 3
[0064] The investigation of washing solvent during embodiment 3 degreasing
[0065] The degreasing step will be applied to edible lipid samples. After evaluating various common degreasing organic solvents, including cyclohexane, n-hexane, ethyl acetate, etc., it is found that the ratio of cyclohexane to polar organic phase is 1:2 , The degreasing effect of repeated washing twice is the best.
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