Potato powder matrix standard sample containing flumorph residue and preparation method thereof

A potato flour, standard sample technology, applied in measurement devices, instruments, scientific instruments, etc., can solve the problem of inability to achieve full fusion of flumorpholine and sample matrix, inability of flumorpholine to fully combine with matrix, inability to correctly indicate quality control, etc. problem, to achieve the effect of low price, good uniformity and long shelf life

Inactive Publication Date: 2015-07-08
FUQING ENTRY EXIT INSPECTION & QUARANTINE BUREAU OF P R C
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this quality control method is that it is impossible to fully integrate flumorph with the sample matrix, so that flumorph cannot be fully combined with the matrix, resulting in the binding status of the target substance and the matrix is ​​not completely consistent with the actual sample
This will lead to the "recovery rate" index for judging the performance of the detection method cannot correctly indicate whether the quality control of the analysis and detection process has been effectively guaranteed, resulting in "false negatives" in the detection process

Method used

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  • Potato powder matrix standard sample containing flumorph residue and preparation method thereof
  • Potato powder matrix standard sample containing flumorph residue and preparation method thereof
  • Potato powder matrix standard sample containing flumorph residue and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0038] 1. Preparation of high-purity samples of flumorph:

[0039] 1) recrystallization :

[0040] Weigh 20 g of the commercially available pesticide flumorph wettable powder (content: 20 wt%) in a 200 mL retort, add 120 mL of acetone, reflux at 55 °C for 45 min, filter while hot and collect all the filtrate, 40 °C Concentrate to nearly dryness under low temperature, and place to dry at room temperature to obtain a solid (about 4 g); add 100 mL of ethyl acetate to the obtained solid, heat to 70 °C until the solid is completely dissolved, and add 0.2 g of activated carbon , kept at 70°C for 10 min, filtered hot, concentrated the filtrate at 40°C to obtain a slurry; gradually added ethyl acetate to the slurry and shaken to obtain a homogeneous transparent solution, and then added petroleum ether gradually until a transparent solution It is turbid, and the turbidity can become transparent after proper heating, indicating that the solution has reached a saturated state. Filter ...

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Abstract

The invention belongs to the technical field of plant-derived food matrix standard substances of pesticide residue detection, and particularly relates to a potato powder matrix standard sample containing flumorph residue and a preparation method thereof. The preparation method comprises the steps that a high-purity flumorph sample is prepared into a solution, potato powder is added into the solution and is wetted completely, and the flumorph and the potato powder are fully fused through sealing and soaking for 200 h; then the solution is arranged in a fuming cupboard, and a bottle plug is opened, so that an organic solvent is volatilized dry; the matrix standard sample is mixed evenly and subpacked; the formed stable and uniform matrix sample is dried, mixed evenly and subpacked to form the matrix standard sample; the matrix standard sample is checked and valued; uniformity and stability detection and collaborative valuing are carried out on the obtained matrix standard sample.

Description

technical field [0001] The invention belongs to the technical field of plant-derived food matrix standard substances for pesticide residue detection, and more specifically relates to a potato flour matrix standard sample containing flumorph residues and a preparation method thereof. Background technique [0002] Flumorph (Flumorph), colorless crystals, CAS: 211867-47-9. Chemical name: (E,Z)-4-[3-(4-fluorophenyl)-3-(3,4-dimethoxyphenyl)acryloyl]morpholine. The molecular formula is: C 21 h 22 FNO 4 , the molecular weight is: 371.406, and the structural formula is as follows: [0003] [0004] Flumorph belongs to carboxylic acid amides (CAAs) fungal fungicides. It is the first self-developed, commercialized fungicide with independent intellectual property rights in my country. It is mainly used in the prevention and treatment of oomycete diseases in agricultural production. , It is also particularly effective against Peronospora and Phytophthora, and it has bactericidal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/06
Inventor 丁立平蔡春平刘正才王丹红
Owner FUQING ENTRY EXIT INSPECTION & QUARANTINE BUREAU OF P R C
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