Detection method of residual content of paraquat in environment
A technology of residue content and detection method, applied in measuring devices, instruments, scientific instruments, etc., can solve the problems of low accuracy and precision, detection of paraquat residues, etc., to achieve reliable implementation and meet the needs of research and production , the effect of accurate quantitative analysis
Active Publication Date: 2013-07-03
SHENZHEN YU CHI TESTING TECH CO LTD
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[0004] The invention overcomes the shortcomings of low accuracy and precision in the detection of paraquat residues in the prior art and cannot detect the paraquat residues in the soil, and provides a method for detecting the residues of paraquat in the environment
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[0029] as attached figure 1 As shown, the detection method of paraquat residual content in a kind of environment of the present embodiment mainly consists of four steps: configuring paraquat standard solution, drawing a standard curve, sample pretreatment, detecting the test solution and calculating the concentration of paraquat in the sample. The steps are composed of detecting the soil, and the specific steps are:
[0030] A. Prepare paraquat standard solution: dilute the paraquat standard solution with acetonitrile to prepare paraquat standard solutions with different concentrations such as 1.25, 2.50, 5.00 mg / L, etc.;
[0031] B. Draw a standard curve: the concentrations described in step A are followed by 1.25, 2.50, 5.00mg / L of a plurality of different concentrations of paraquat standard solutions were analyzed by high-performance liquid chromatography, and the chromatograms of the three concentrations were drawn. The peak area was calculated from the drawn chromatogra...
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Abstract
The invention provides a detection method of the residual content of paraquat in an environment. Aiming to overcome the defects that the accuracy and the precision of the detention of the residual content of the paraquat in the prior art are not high and the residual content of the paraquat in the soil cannot be detected, the invention provides the detection method of the residual content of the paraquat in the environment. The detection method mainly comprises four steps of: preparing a paraquat standard solution, drawing a standard curve, pre-treating a sample, and detecting a testing solution to calculate the concentration of the paraquat in the sample. The detection method disclosed by the invention has the advantages of accuracy and convenience, rapidness and effectiveness; and the relative standard deviation of the detection method is less than 10% so that the detection method is suitable for the environment of detecting the residual content of the paraquat.
Description
technical field [0001] The invention relates to a method for detecting compounds, in particular to a method for detecting residual content of paraquat in the environment. Background technique [0002] Paraquat, also known as Paraquat, Gramoxone, 1,1'-Dimethyl-4,4'-bipyridine cationic salt, molecular formula: C12H14Cl2 N2, molecular weight 257.2, CAS number: 1912-24- 9. It is an organic heterocyclic contact defoliant and herbicide, with a solubility of 700 g / L (20°C), easily soluble in water. Chemical Structure: [0003] At present, paraquat is widely used on more than 50 crops in more than 120 countries around the world. As a specific herbicide, its role is obvious, but the hidden dangers of paraquat to human health cannot be ignored. Long-term ingestion, inhalation or skin contact can cause kidney, liver and heart problems, leading to spots in the lungs and narrowing of the esophagus. In addition, it also has obvious irri...
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IPC IPC(8): G01N30/02G01N30/06
Inventor 张婷马晓波
Owner SHENZHEN YU CHI TESTING TECH CO LTD