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Enzyme sensor for detecting pesticide residues in grains

A pesticide residue and enzyme sensor technology, applied in the field of pesticide residues, can solve the problems of difficult direct electron transfer between enzymes and electrodes, reduce normal transmission of electrical signals, pesticide residue data errors, etc., to ensure normal transmission, improve robustness, and improve accuracy. sexual effect

Pending Publication Date: 2022-04-12
HEILONGJIANG BAYI AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Enzyme biosensors use enzymes as biological sensitive elements, capture the reaction between the target and the sensitive elements through various physical and chemical signal converters, and produce measurable signals proportional to the concentration of the target, which can detect food However, during the detection process, the electroactive center of the enzyme molecule is deeply buried inside the molecule and is easily deformed after being adsorbed on the electrode surface, making it difficult to perform direct electron transfer between the enzyme and the electrode. After the detection process, the data is transmitted to the transducer through electronic transfer, and then the electrical signal is transmitted through the transducer, which needs to be connected to an external signal processing system. Contact, causing dust to enter the transducer, reducing the normal transmission of electrical signals, resulting in certain errors in the detected pesticide residue data

Method used

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  • Enzyme sensor for detecting pesticide residues in grains
  • Enzyme sensor for detecting pesticide residues in grains
  • Enzyme sensor for detecting pesticide residues in grains

Examples

Experimental program
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Effect test

Embodiment 1

[0024] as attached figure 1 to attach Figure 6 Shown:

[0025] The present invention is an enzyme sensor for detecting pesticide residues in food. Its structure includes an outer frame 1, a sensing device 2, and a transducer 3. The left end of the outer frame 1 is embedded with a sensing device 2, and the sensing device 2 is located at the left end of the transducer 3, the transducer 3 is embedded and installed inside the right end of the outer frame 1, and the sensing device 2 includes a slider 21, a sliding plate 22, a pole 23, a correction mechanism 24, and an electrode mechanism 25 , sensor 26, the slider 21 is slidably installed inside the upper end of the outer frame 1, and the sliding plate 22 is installed on the upper end of the slider 21, the lower end of the sliding plate 22 is welded with a pole 23, and the lower end of the pole 23 is provided with a correction mechanism 24. The electrode mechanism 25 runs through the inside of the calibration mechanism 24 with c...

Embodiment 2

[0033] as attached Figure 7 to attach Figure 8 Shown:

[0034] Wherein, the transducer 3 includes a main body 31, a spring 32, a guide rod 33, a contact joint 34, and a dustproof mechanism 35. The left end of the main body 31 is fixed to the right end of the sensor 26, and the spring 32 is arranged inside the right end of the main body 31. , the right end of the spring 32 is fixed to the left end of the guide rod 33, and the guide rod 33 is mounted inside the right end of the main body 31 with clearance fit, and the contact joint 34 is arranged inside the right end of the main body 31, and the contact joint 34 adopts a gap Fitting through the middle end of the dust-proof mechanism 35, the dust-proof mechanism 35 is slidably installed inside the right end of the main body 31, a magnetic piece is provided inside the right end of the main body 31 and outside the left end of the dust-proof mechanism 35, and two magnetic pieces The magnetic attraction of each other ensures that...

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Abstract

The invention discloses an enzyme sensor for detecting pesticide residues in grain, the structure of the enzyme sensor comprises an outer frame, a sensing device and a transducer, the sensing device is fixedly embedded in the left end of the outer frame, the sensing device is arranged at the left end of the transducer, after the electroactivity of enzyme molecules is adsorbed on the surface of an electrode rod, a sliding plate is pushed, and the enzyme molecules are adsorbed on the surface of the electrode rod. At the moment, a sliding ring slides on the outer side of an electrode rod, an abutting piece slides on the outer side of the electrode rod to correct and straighten an electrode mechanism, once the electrode rod deforms, a spring pipe sleeve in a sealing frame is extruded, a clamping rod is clamped in the electrode rod at the moment, and the situation that the electrode rod falls off from a sensor after deformation is avoided. After the connector on the signal processing system is pulled out of the contact connector, the dustproof cover is pushed out through outward ejection of the spring, the opening and closing piece is closed around the torsion shaft, dust is prevented from making contact with the contact connector, normal transmission of electric signals is ensured, and errors of detected pesticide residue data are avoided.

Description

technical field [0001] The invention relates to the field of pesticide residues, and more specifically relates to an enzyme sensor for detecting pesticide residues in grains. Background technique [0002] Enzyme biosensors use enzymes as biological sensitive elements, and through various physical and chemical signal converters to capture the reaction between the target and the sensitive element, the measurable signal that is proportional to the concentration of the target is generated. However, during the detection process, the electroactive center of the enzyme molecule is deeply buried inside the molecule and is easily deformed after being adsorbed on the electrode surface, making it difficult to perform direct electron transfer between the enzyme and the electrode. After the detection process, the data is transmitted to the transducer through electronic transfer, and then the electrical signal is transmitted through the transducer, which needs to be connected to an extern...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/00G01N33/02
Inventor 于润众张丽媛张东杰王长远
Owner HEILONGJIANG BAYI AGRICULTURAL UNIVERSITY