A kind of precise pesticide residue spectrum detection method
A spectral detection and pesticide residue technology, applied in the field of spectral detection, can solve the problem of low detection accuracy and achieve the effect of improving accuracy
Inactive Publication Date: 2015-09-23
CHONGQING UNIV
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Problems solved by technology
[0006] The existing pesticide residue detection often uses color comparison cards, which form a one-to-one detection, and the detection accuracy is low
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[0032] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0033] A kind of precise pesticide residue spectrum detection method, in this method adopts a kind of detection device, the structure of this detection device is as follows figure 1 , 2 As shown, the detection device includes a rotary table 1, a stage 2, a light source device, a reaction chamber, and an automatic injector for pesticide residue samples ( figure 1 , 2 Not shown in), light receiving probe 3, fiber optic spectrometer 4, transmission gear 5, stepping motor 6, and laser transmitter I and laser receiver for positioning quartz glass cup 14 ( figure 1 , 2 not shown).
[0034] Wherein, the turntable 1 is a hollow structure, such as image 3 , 4 As shown, the bottom of the turntable 1 has a boss 25, the boss 25 at the bottom of the turntable 1 passes through the object stage 2 and fits with the object stage 2 in clearan...
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The invention discloses a method for accurately detecting pesticide residues through the spectrum. The method includes the following steps of firstly, turning on a stepping motor, rotating reaction chambers, and when quartz glass cups rotate till light rays emitted by laser transmitters I can just be emitted out of through holes of outer circles, turning off the stepping motor; secondly, injecting pesticide residue samples into the quartz glass cups through an automatic sample injecting device; thirdly, turning on the laser transmitters I again, and conducting first sampling through an optical fiber spectrograph; finally, turning off the laser transmitters I. The operation is repeatedly conduced according to the steps till all the array quartz glass cups arrayed in the reaction chambers are detected. A rotating platform, an object carrying platform, a light source device, the reaction chambers, the automatic sample injecting device, light receiving probes, the optical fiber spectrograph, a transmission gear and the stepping motor are combined, each reaction chamber contains the plurality of quartz glass cups, the plurality of quartz glass cups can be detected at a time, or the characteristic of the cross array response can be utilized to further accurately detect a certain quartz glass cup, and the accuracy of the qualitative and quantitative detection is improved.
Description
technical field [0001] The invention relates to a spectral detection method, in particular to an accurate spectral detection method of pesticide residues. Background technique [0002] Existing detection methods for micro-trace pesticide residues, in recent years, more commonly used chromatography, including gas chromatography, high performance liquid chromatography, gas-mass spectrometry, liquid-mass spectrometry and other large-scale instrument analysis. These methods can maintain the accuracy and precision of data, but the operation process is complicated, the detection cycle is long, the reagent consumption is large, and professional personnel are required to operate, which has seriously affected the popularization of pesticide detection. [0003] In recent years, scholars at home and abroad have also focused their research on biosensors, which are mainly based on the principle of enzyme inhibition or directly using organophosphate hydrolase detection. AChE can be inhib...
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IPC IPC(8): G01N21/31
Inventor 侯长军黄晶霍丹群罗小刚法焕宝雷靳灿侯经洲
Owner CHONGQING UNIV