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Analysis method of mancozeb

A technology of mancozeb and analysis method, which is applied in the field of pesticide analysis, can solve the problems of cumbersome operation steps and troublesome treatment of heavy metal waste liquid, and achieve the effect of avoiding acid decomposition

Active Publication Date: 2013-10-09
利民化学有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still many deficiencies in the currently reported methods, for example, the GB20699-2006 method needs to use many solutions, and the heavy metal waste liquid contained in the reaction product is troublesome to deal with.
The mixture of L-cysteine ​​hydrochloride and EDTA and the methyl iodide method sample need to extract, combine the organic phase and concentrate with nitrogen blowing, the operation steps are cumbersome

Method used

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  • Analysis method of mancozeb
  • Analysis method of mancozeb
  • Analysis method of mancozeb

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Preparation of standard solution: Accurately weigh 100mg of standard substance with a content of 88.0wt% (accurate to 0.01mg), add an appropriate amount of mixed solution B to a 100ml volumetric flask, and dissolve it in supernatant, then add the above mixed solution B to make up to the mark, After mixing, take 1ml into a 25ml volumetric flask, dilute to the volume with mixed solution B, and mix well for later use.

[0035] Preparation of sample solution: Accurately weigh about 100mg of the mancozeb sample (accurate to 0.01mg) in a 100ml volumetric flask, add an appropriate amount of mixed solution B, dissolve it in supernatant, then add the above mixed solution B to the volume, mix well and take 1ml In a 25ml volumetric flask, use mixed solution B to dilute to the volume, mix well and set aside.

Embodiment 2

[0037] A C18 chromatographic column was used, the mobile phase was methanol:buffer solution=7:3 (V / V), the flow rate was 0.9ml / min, the column temperature was 29°C, the detection wavelength was 282nm, and the injection volume was 20μL. Enter the standard solution under the above conditions, repeat the injection until the difference between the peak areas obtained by two adjacent injections is less than 1%, and then perform HPLC analysis in the order of standard, sample, sample, and standard. The results are shown in the appendix. Figure 1-4 , so as to obtain the content of mancozeb, which is 91.07%.

Embodiment 3

[0039] A C18 chromatographic column was used, the mobile phase was methanol:buffer solution=7:3 (V / V), the flow rate was 0.6ml / min, the column temperature was 27°C, the detection wavelength was 270nm, and the injection volume was 20μL. Enter the standard solution under the above conditions, repeat the injection until the difference between the peak areas obtained by two adjacent injections is less than 1%, and then analyze in the order of standard, sample, sample, and standard to obtain Maneb Zinc content, its content is 90.17%.

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Abstract

The invention discloses an analysis method of mancozeb. The method comprises the following steps of: using a high efficiency liquid chromatography, taking mixing solution of methanol and buffer solution as a mobile phase by adopting a C18 chromatographic column; carrying out detection at proper flow velocity, column temperature and detection wavelength; and analyzing the content of the mancozeb. The analysis method disclosed by the invention is simple, convenient, fast, high in accuracy, and good in precision; a reagent can be saved; and industrial pollution also can be reduced.

Description

technical field [0001] The invention relates to the field of pesticide analysis, in particular to an analysis method of high performance liquid chromatography. Background technique [0002] Mancozeb, the chemical name is a coordination complex of manganese ethylene bisdithiocarbamate and zinc ions. Pure product is white powder, industrial product is off-white or light yellow powder, insoluble in water and most organic solvents, but soluble in pyridine, unstable to light, heat and humidity, easy to decompose into carbon disulfide, when stored at 35°C , 0.18% weight loss per month, high temperature and humidity and acid will decompose. Rat acute oral LD5012800~14000mg / kg. [0003] Mancozeb is used as a protective fungicide for many leaf diseases, and it has a good effect on wheat rust, corn leaf spot, downy mildew in vegetables, anthracnose and fruit tree scab. Mancozeb is mixed with other pesticides for better effect. At present, there are a large number of reports on the...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06
Inventor 许梅孙敬权王信然韩情
Owner 利民化学有限责任公司
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