GC-MS method for analysis of pesticide latent components in pesticide products
A GC-MS, pesticide technology, applied in the direction of analytical materials, material separation, instruments, etc., can solve the problems of quality and safety threats, difficult qualitative and quantitative, and the level of detection technology cannot be satisfied, and achieve the effect of strong pertinence and high sensitivity
Pending Publication Date: 2019-10-18
TIANJIN INSTITUE OF QUALITY STANDARD & TESTING OF AGRICULTUAL PRODS
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Problems solved by technology
For example, adding high-efficiency or quick-acting pesticide ingredients to pesticides with general preventive effects, this kind of situation often occurs in vegetable pesticides, such as adding beta-cyhalothrin to avermectin, and the fake patterns are constantly being refurbished. Representatives of merchants and production companies even use the addition of some hidden ingredients as "selling points" to publicize and recommend them to farmers, which poses a serious threat to agricultural production and the quality and safety of agricultural products. Effective measures must be taken to crack down on illegal additions
[0003] Judging from the results of pesticide supervision and spot checks announced by the Ministry of Agriculture in recent years, the quality problems of pesticide products mainly involve undetected active ingredients, insufficient content of active ingredients, and illegal addition of hidden ingredients. The trend is increasing year by year. Due to the wide coverage and variety of problems, it is difficult to quantify and quantify. The existing detection technology level cannot meet the needs of supervision and law enforcement.
There is no literature report on similar technology
Method used
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Embodiment 1
[0029] Taking the 5% imidacloprid emulsifiable concentrate for testing as a sample, the method of the present invention is used for sample pretreatment, and GC-MS is used for determination. The preparation method is as follows:
[0030] 1. Instruments and reagents:
[0031] Gas chromatography-mass spectrometer, American Agilent 7890A / 5973N; Swiss Mettler electronic balance with a sensitivity of 0.00001g; ultrasonic extraction instrument; the purity of pesticide standard products is not less than 99%, purchased from Dr.E company in Germany; acetonitrile, acetone, n-hexane Chromatographically pure.
[0032] 2. Sample pretreatment method:
[0033] a. Accurately weigh 20mg of the pesticide product in a beaker, accurate to 0.1mg, add 80mL of acetonitrile, ultrasonicate for 30min, transfer all to a 100mL volumetric flask, add 10mL of acetonitrile to clean the beaker, and transfer to the volumetric flask, add acetonitrile to 100mL, Shake well, this solution is liquid a, and the co...
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Abstract
The invention provides a GC-MS method for the analysis of pesticide latent components in pesticide products. A method capable of simultaneously detecting latent components of ten high-risk pesticidesis established by gas chromatography-mass spectrometry (GC-MS). The method having high sensitivity is capable of realizing detection accurately, qualitatively, and quantitatively; the pertinence of the screened pesticide types is high; the method is suitable for various pesticides; and defect of low detection level and difficult quantitative determination of the current detection technology can beovercome. At present, no same similar technology is reported.
Description
Technical field: [0001] The invention belongs to the research field of rapid screening technology for agricultural inputs, and relates to a GC-MS precise screening method for pesticide hidden components in pesticide products, using acetonitrile ultrasonic extraction, dilution, and GC-MS method to determine the hidden content of 10 high-risk pesticides in pesticide products Adding ingredients can be accurately qualitative and quantitative. Background technique: [0002] With the increase of people's safety awareness and understanding level, the registration of nearly 40 high-toxic and high-risk pesticide varieties has been cancelled. The supervision of government departments at all levels is constantly increasing, and the quality of products in the pesticide market is constantly improving. However, in order to achieve the purpose of improving the control effect, expanding the scope of use, or reducing production costs, some manufacturers will add hidden ingredients to existin...
Claims
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Patent Timeline
Login to View More IPC IPC(8): G01N30/02G01N30/72G01N30/06G01N30/14G01N30/04G01N30/86
CPCG01N30/02G01N30/72G01N30/06G01N30/14G01N30/04G01N30/8634G01N2030/146G01N2030/047
Inventor 李娜张玉婷李辉刘磊邵辉卢娜李晋津张宇娇郭永泽
Owner TIANJIN INSTITUE OF QUALITY STANDARD & TESTING OF AGRICULTUAL PRODS