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Method for detecting content of cyhalofop-butyl and pyribenzoxim in compound preparation

A technology of pyrimidifen and cyhalofop-butyl, applied in the field of analytical chemistry, can solve the problems of inseparability, time-consuming, waste of reagents and the like, and achieve the effects of high sensitivity, good reproducibility and accurate detection results

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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, no relevant patents have been found for the method of determining the content of cyhalofop-ethyl and saflufenacil together at home and abroad, while the detection method for the composition of cyhalofop-fop is a forward detection method of high performance liquid chromatography, and the detection method for the composition of saflufenacil is a high-efficiency Liquid chromatography reversed-phase detection method, and the currently disclosed method takes a long time to detect each component separately and wastes reagents, and the impurity peak cannot be separated from the active component peak by copying the detection method

Method used

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  • Method for detecting content of cyhalofop-butyl and pyribenzoxim in compound preparation
  • Method for detecting content of cyhalofop-butyl and pyribenzoxim in compound preparation
  • Method for detecting content of cyhalofop-butyl and pyribenzoxim in compound preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The chromatographic conditions for detection are as follows:

[0038] Variable wavelength ultraviolet detector, C18 chromatographic column 5.0μm250mm×4.6mm (I.D.);

[0039] Mobile phase: acetonitrile: water = 60: 40;

[0040] Detection wavelength: 232nm;

[0041] Flow rate: 1.0mL / min;

[0042] The specific detection method is:

[0043] Accurately weigh 0.05g of the standard cyhalofop-methyl and 0.0210g of saflufenacil in the same 50mL volumetric flask, dissolve and dilute to the mark with acetonitrile. Weigh about 0.8100g of a sample of 60g / L cyhalofop-methyl + 25g / L saflufenacil compound EC, place it in a 50mL volumetric flask, dissolve it with acetonitrile and dilute to the mark, and degas it by ultrasonic for 5 minutes. The standard sample was taken for liquid chromatography analysis, the injection volume was 5 μL, and the peak areas of cyhalofop-ethyl and saflufenacil were determined. Samples were taken for liquid chromatography analysis with an injection volum...

Embodiment 2

[0049]In order to verify the feasibility and accuracy of the detection method of Example 1, a precision test was carried out. The test adopted a concentration of 1000 mg / L of cyhalofop-ester and saflufenacil standard solution prepared, and 5 μL of the standard solution was continuously injected 6 times. The measurement results are shown in Table 2.

[0050] Table 2

[0051] serial number

[0052] It can be drawn from Table 2 that the RSD of the peak area is less than 2%, so this method has good stability.

Embodiment 3

[0054] In order to better illustrate the stability of the sample solution containing cyhalofop-ethyl and saflufenacil provided in the examples of the present invention, the sample solution was prepared and placed for 4h, 8h, 12h, and 24h respectively, and then analyzed by liquid chromatography. The results are shown in Table 3.

[0055] table 3

[0056]

[0057]

[0058] As can be seen from Table 3, the RSD of the peak area is less than 2%, and the stability of the test solution provided by the present invention is good.

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Abstract

The invention provides a method for detecting the content of cyhalofop-butyl and pyribenzoxim in a compound preparation. The method comprises the following steps: detecting a to-be-tested sample of acompound preparation of cyhalofop-butyl and pyribenzoxim by high performance liquid chromatography to obtain the content of cyhalofop-butyl and the content of pyribenzoxim, wherein the wavelength of high performance liquid chromatography is 225 to 240 nm; and the mobile phase of high performance liquid chromatography is a mixture of acetonitrile and water, and the volume ratio of acetonitrile to water is (58 to 62) to (38 to 42), so that the method provided by the invention can be used to carry out detection without pre-treatment of the compound preparation of cyhalofop-butyl and pyribenzoxim,and the detection result is accurate, the reproducibility is good, and the sensitivity is high.

Description

technical field [0001] The invention relates to the field of analytical chemistry, in particular to a method for detecting the content of cyhalofop-methyl and saflufenacil in compound preparations. Background technique [0002] Cyhalofop-ethyl and saflufenacil compound EC or compound oil suspension is a compound herbicide with remarkable herbicidal effect on gramineous weeds. At present, no relevant patents have been found for the method of determining the content of cyhalofop-ethyl and saflufenacil together at home and abroad, while the detection method for the composition of cyhalofop-fop is a forward detection method of high performance liquid chromatography, and the detection method for the composition of saflufenacil is a high-efficiency The liquid chromatography reversed-phase detection method, and the currently disclosed method takes a long time to detect each component separately and wastes reagents, and the impurity peak cannot be separated from the active component...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02
CPCG01N30/02
Inventor 孙国庆侯永生吴秀改王建娜张翠
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