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A method for detecting the residual amount of flufenamide in wheat

A technology for the detection of cycloflufen and its detection method, which is applied in the field of detection of cycloflufen residues in wheat, can solve the problems of difficult popularization and application, high detection cost, and low work efficiency, and achieve good promotion and application value and popularization of instruments The effect of high rate and low detection cost

Active Publication Date: 2019-06-07
河南省联检药物分析有限公司
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Problems solved by technology

[0003] In the extraction methods in the prior art, the extracting solution is mostly acetone, which requires a large amount, complicated purification in the later stage, and serious environmental pollution; after extraction and salting out, it is mostly rotary evaporation, and the work efficiency is low; some methods are simple in pretreatment, but the detection method used The instrument is mass spectrometry, the popularity rate is low, the method is difficult to popularize and apply, and the detection cost is high

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  • A method for detecting the residual amount of flufenamide in wheat
  • A method for detecting the residual amount of flufenamide in wheat
  • A method for detecting the residual amount of flufenamide in wheat

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[0025] The present invention will be further described below in conjunction with specific embodiments. It should be understood that the following examples are only used to illustrate the present invention rather than limit the scope of the present invention, and those skilled in the art can make some non-essential improvements and adjustments based on the content of the above invention.

[0026] The detection method of flufenamide residual amount in wheat of the present invention, concrete steps are as follows:

[0027] 1. Determination of the content of cycloflufenamide in wheat

[0028] (1) Preparation of standard solution: Weigh the standard substance of cycloflufenamide, dissolve it with n-hexane to make a 1000 mg / L mother solution, and then dilute it step by step to 0.05mg / L, 0.1mg / L, 0.5mg / L L, 1mg / L, 2mg / L standard solution;

[0029] (2) Draw a standard curve: pass the standard solution prepared in step (1) through the chromatographic column RTX-5 (30 m×0.25 mm×0.25 μ...

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Abstract

The invention discloses a detection method for a residual amount of cyflufenamid in wheat. The method comprises the following steps: 1, preparing a standard solution; 2, drawing a standard curve; 3, extracting a sample; 4, purifying the sample; 5, detecting the sample; and 6, calculating a result. According to the detection method, acetonitrile is used as an extraction liquid, compared with the acetone serving as the extraction liquid, less liquid is used, and the later purification is relatively simple; compared with the methanol serving as the extraction liquid, after the extraction and salt precipitation, a heating plate is dried in a steaming manner, and no rotary evaporation is needed, so that the working efficiency is improved; the popularization of the instrument for detection is relatively high, and the method is easy to popularize and use; the reproducibility, the accuracy, the precision and the detection limit of the detection method of the invention can meet the requirements on the analysis of residues of pesticide in the wheat; and by adopting the detection method, the environmental pollution is reduced, the detection cost is reduced, the working efficiency is improved, the practicability is high, and the popularization and application value is high.

Description

technical field [0001] The invention belongs to the field of detection of pesticide residues, and in particular relates to a detection method of fluflufenamide residues in wheat. Background technique [0002] Cyflufenamid English name: cyflufenamid, CAS number: 180409-60-3, molecular formula: C 20 h 17 f 5 N 2 o 2 , chemical name: (Z)-N-[α-(cyclopropylmethoxyimino)-2,3-difluoro-6-(trifluoromethyl)benzyl]-2-phenylacetamide. Cyflufenamide is an amide fungicide, which inhibits the formation and growth of haustoria on mycelia in the life cycle of powdery mildew (that is, the pathogenesis process), the growth of secondary hyphae and the formation of appendages, but it has no effect on spores. Germination, germ tube elongation and appendage formation had no effect. It has no cross-resistance with fungicides currently commercialized or under research, and is effective against all strains of powdery mildew bacteria that are resistant to demethylation inhibitors, sterols and be...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02G01N30/06
CPCG01N30/02G01N30/06
Inventor 吴绪金周娟张军锋周玲马婧玮李通李萌李业东马欢
Owner 河南省联检药物分析有限公司
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