Method for quantitating abamectin, alachlor and procymidone in edible vegetable oil
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A technology for edible vegetable oil and abamectin, which is applied in the directions of measuring devices, instruments, scientific instruments, etc., can solve the problems of matrix interference, no report on the analysis of abamectin residues, low sensitivity, etc., and achieves reduced maintenance and specificity. and high sensitivity and repeatability
Active Publication Date: 2017-01-04
厦门泓益检测有限公司 +3
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At present, the residual analysis method of abamectin is mainly liquid chromatography, but when using the ultraviolet detector, the sensitivity is too low, the matrix interference is serious, and the residual detection objects are concentrated in vegetables, fruits, rice, tea and other matrices. The analysis method for the residues of alachlor and procymidone is mainly gas chromatography, and the detection objects are mainly plant samples and water environment samples. So far, no abamectin, alachlor and procymidone have been eaten at the same time. Residue Analysis Report in Vegetable Oils
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Embodiment 1
[0040] 1. Instruments and reagents
[0041] Liquid chromatograph Agilent 1100, FLD, American Agilent Company;
[0042] Gas chromatograph Agilent 6890, ECD, American Agilent Company;
[0047] Anhydrous methanol and acetonitrile are chromatographically pure;
[0048] Abamectin standard substance (purity is 93.0%, German Dr.Ehrenstorfer GmbH company);
[0049] Alachlor standard substance (purity is 97.5%, German Dr.Ehrenstorfer GmbH company);
[0050] Procymidone standard substance (purity: 99.5%, Dr. Ehrenstorfer GmbH, Germany).
[0051] 2. Prepare standard working solutions
[0052] (1) Accurately weigh 0.0512g of Abamectin in a 100mL volu...
Embodiment 2
[0078] As described in Example 1, edible vegetable oil sample B was selected, and the contents of abamectin, alachlor and procymidone in the sample were measured.
Embodiment 3
[0080] As described in Example 1, edible vegetable oil sample C was selected, and the contents of abamectin, alachlor and procymidone in the sample were measured.
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Abstract
The invention discloses a method for quantitating abamectin, alachlor and procymidone in edible vegetable oil. A sample is subjected to methanol vortex oscillation extraction and purified with an Envi-18 solid-phase extraction column, the content of alachlor and procymidone in part of the sample is directly analyzed with a gas chromatograph, the rest sample is subjected to derivatization with N-methylimidazole and trifluoroacetic anhydride, and the content of abamectin is determined with a liquid chromatogram-fluorescence method. Fewer reagents are adopted in the method, abamectin, alachlor and procymidone in the edible vegetable oil can be effectively extracted, and the cost is saved; the sample pretreatment method is simple, a cleaner loading solution is provided, and maintenance of instruments during usage is reduced; measured results are accurate, the repeatability is good, detection specificity and sensitivity are high, and the reference is provided for simultaneous detection of the content of abamectin, alachlor and procymidone in the edible vegetable oil.
Description
[0001] Technical field: [0002] The invention belongs to the technical field of detection of pesticide content in edible vegetable oil, and mainly relates to the detection technology of abamectin, alachlor and procymidone in edible vegetable oil. [0003] Background technique: [0004] Abamectin is a 16-membered macrolide compound of antibiotics first developed by Satoshi Omura of Kitasato University in Japan and Merck Company of the United States. The difference between general insecticides is that it interferes with neurophysiological activities and stimulates the release of γ-aminobutyric acid, which has an inhibitory effect on the nerve conduction of arthropods; abamectin has been widely used in the prevention and control of parasitism in and out of poultry and livestock Insects and crop pests, such as parasitic red worms, Diptera, Coleoptera, Lepidoptera and harmful mites, etc., especially after being used in various crops such as vegetables, melons and fruits, rice, cott...
Claims
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