Fluorescence spectrum detection device for pesticide residue

A fluorescence spectrum and detection device technology, which is applied in the field of pesticide residue fluorescence spectrum detection devices, can solve the problems of cumbersome sample pretreatment, difficult to meet the rapid detection of pesticide residues on site, etc., and achieves portable design, simple pretreatment method, and reduced system cost effect

Inactive Publication Date: 2013-12-04
SUZHOU INST OF BIOMEDICAL ENG & TECH CHINESE ACADEMY OF SCI
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  • Application Information

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Problems solved by technology

Although the technology is mature and the detection accuracy is high, the pretreatment of samples is cumbersome and requires large-scale laboratory equipment for detection, and most of them are destructive, which makes it difficult to achieve rapid on-site detection of pesticide residues in vegetables

Method used

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  • Fluorescence spectrum detection device for pesticide residue
  • Fluorescence spectrum detection device for pesticide residue
  • Fluorescence spectrum detection device for pesticide residue

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The principle of this embodiment is similar to that of the traditional method, and optical fiber is used for optical transmission. The difference is that in this embodiment, an optical filter group 7 and a photosensitive element 5 are arranged behind the coupling lens 4 to replace the original spectrometer. The selection of a suitable filter in the filter 7 obtains the measured spectral intensity of the corresponding pesticide residue, and according to the comparison between the measured spectral intensity and the threshold value, it is determined whether the pesticide residue exceeds the standard.

Embodiment 2

[0035] like Figure 4 As shown, this embodiment is a compact design structure of the detection device in Embodiment 1. The working principles of the two embodiments are similar, and the main difference is that this embodiment does not use expensive optical fibers, but passes the light emitted by the uniform light integrating rod 2 through the focusing lens 3 arranged in front of the uniform light integrating rod 2 , directly form electric light source excitation on the vegetable stems and leaves 10 to be tested, and the fluorescence generated by the pesticide residues passes through the coupling lens 4, and enters the photosensitive element 5 after being filtered by the filter sheet group 7, and the characteristic peak intensity of the fluorescence measured by comparison With the threshold intensity, qualitatively determine whether the pesticide residues exceed the standard.

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Abstract

The invention discloses a fluorescence spectrum detection device for pesticide residue, which comprises a high-brightness LED module; a dodging integrator rod is arranged in front of the high-brightness LED module; a drive circuit is arranged behind the high-brightness LED module; a focusing lens is arranged in front of the dodging integrator rod; a vegetable stem leaf is placed near the focusing lens; a coupling lens is arranged on the other side of the vegetable stem leaf; a light filter pack and a light sensitive element are sequentially arranged at the back of the coupling lens. Through the adoption of the technical scheme, a novel narrow-band multispectral LED light source is adopted, the emission of a plurality of narrow-band light wave lengths can be achieved through a single light source module, the broadband narrow-band light covering achieved through the combination of a plurality of light sources traditionally is achieved, the system cost is lowered greatly, and the device has the advantages of high sensitivity, small sample use amount, quickness, good reproducibility and no destructibility, and has a wide application prospect in the aspect of detecting trace substances, especially pesticide residue.

Description

technical field [0001] The invention belongs to the field of optical detection of trace substances, in particular to a fluorescent spectrum detection device for pesticide residues. Background technique [0002] At present, my country's food safety problems are prominent, and the problem of pesticide abuse is serious. Commonly used pesticide residue detection methods include gas chromatography (GC), high performance liquid chromatography (HPLC), thin layer chromatography (TLC), immunoassay, enzyme inhibition, biosensor detection and other methods. Although the technology is mature and the detection accuracy is high, the pretreatment of samples is cumbersome and requires large-scale laboratory equipment for detection, and most of them are destructive, making it difficult to achieve rapid on-site detection of pesticide residues in vegetables. It will be a very ideal and practical work if the non-destructive, fast and simple measurement can be directly performed on the surface ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
Inventor 杨西斌熊大曦
Owner SUZHOU INST OF BIOMEDICAL ENG & TECH CHINESE ACADEMY OF SCI
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