Quick determination method for free unsymmetrical dimethylhydrazine in daminozide pesticide

A technique of unsymmetrical dimethylhydrazine and rapid determination, applied in the field of pesticide analysis, can solve problems such as difficult detection, and achieve the effect of simplifying selection

Inactive Publication Date: 2012-08-01
XIAN HANGJIE CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Since the end of the 1960s, my country began to produce Bijiu products. After entering the 21st century, the production technology has made great progress. In recent years, in order to meet the needs of the international market, unsymmetrical dimethylhydrazine residues have been produced. For bijiu products less than 30ppm, conventional analysis methods are difficult to detect the trace residue of unsymmetrical dimethylhydrazine in bijiu. Production and quality control are of great importance

Method used

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  • Quick determination method for free unsymmetrical dimethylhydrazine in daminozide pesticide
  • Quick determination method for free unsymmetrical dimethylhydrazine in daminozide pesticide
  • Quick determination method for free unsymmetrical dimethylhydrazine in daminozide pesticide

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1] Add 0.5mg / mL formaldehyde solution to the three 250mL volumetric flasks close to the mark, add 5.0ul, 10.0ul and 15.0ul standard unsymmetrical dimethylhydrazine to the three volumetric flasks respectively, and add the formaldehyde solution to the mark, Shake well, react for 15 min, and place at room temperature. The standard solutions of 20.0ppm (v / v), 40.0ppm (v / v), and 60.0ppm (v / v) can be obtained.

[0018] 2] Put the prepared standard solution into the chromatograph in turn, and do a good job of recording. The peak that emerges from the C-18 column for about 9 minutes is the UDMH peak, and the peak area is recorded. Three peak area values ​​at three concentrations can be obtained, and a standard curve between the content of unsymmetrical dimethylhydrazine and the peak area can be drawn, such as figure 1 .

[0019] Unbalanced dimethyl hydrazine (ppm)

20

40

60

Peak area

140022

273981

399487

[0020] 3] ...

Embodiment 2

[0023] 1] Add 1.0mg / mL formaldehyde solution to the three 250mL volumetric flasks close to the mark, add 2.5ul, 7.5ul, 12.5ul standard unsymmetrical dimethylhydrazine to the three volumetric flasks respectively, and add the formaldehyde solution to the mark, Shake well, react for 25 min, and place at room temperature. 10.0ppm (v / v), 30.0ppm (v / v), 50.0ppm (v / v) standard solutions of unsymmetrical dimethylhydrazine can be obtained.

[0024] 2] Put the prepared standard solution into the chromatograph in turn, and do a good job of recording. The peak that emerges from the C-18 column for about 9 minutes is the UDMH peak, and the peak area is recorded. Three peak area values ​​at three concentrations can be obtained, and a standard curve between the content of unsymmetrical dimethylhydrazine and the peak area can be drawn, such as image 3 .

[0025] Unbalanced dimethyl hydrazine (ppm)

10

30

50

Peak area

68685

200206

323578 ...

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Abstract

The invention relates to an analytic method for remnant unsymmetrical dimethylhydrazine in daminozide. The method using formaldehyde as derivating agent includes the steps: preparing standard unsymmetrical dimethylhydrazine solution, drawing a standard curve, preparing to-be-detected sample solution, sequentially infiltrating the prepared to-be-detected sample solution into a chromatograph, recording a peak area, substituting the peak area into the standard curve to obtain a UDMH (unsymmetrical dimethylhydrazine) remnant value, and the like. The method solves the technical problem that using conventional analytic methods is difficult to detect trace remnant unsymmetrical dimethylhydrazine in daminozide, and is significant to production and quality control of daminozide products.

Description

technical field [0001] The invention relates to a method for analyzing unbalanced dimethylhydrazine residues in Bijiu, and belongs to the technical field of pesticide analysis. Background technique [0002] Since my country began to produce Bijiu products in the late 1960s, after entering the 21st century, the production technology has made great progress. In recent years, in order to meet the needs of the international market, UDMA residues have been produced. For Bijiu products less than 30ppm, it is difficult for conventional analytical methods to detect the trace residues of Bijiu. Production and quality control are of great significance. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a method for detecting and analyzing free unsymmetrical dimethyl hydrazine with a residual of unsymmetrical dimethyl hydrazine of less than 30 ppm. [0004] The technical solution of the present invention: [0005] The special feature of the method f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02
Inventor 闫小宁王卫国陈帅郭友王龙龙白海龙田建军李承柱马翔陈卫民许峰李军锋许东兴姚中东李军平杨玲苏雪春何宇吉卉张慧刘丽
Owner XIAN HANGJIE CHEM TECH
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