Device and method for fruit and vegetable pesticide residues based on laser Raman spectrometer

A technology of laser Raman spectroscopy and pesticide residues, which is applied in the directions of measuring devices, Raman scattering, and material excitation analysis, can solve the problems of inability to detect pesticide residues in fruits and vegetables, difficulty in overcoming the influence of fluorescence effects, and sensitivity limitations. Low power consumption, easy to carry, avoid stray light effect

A technology of laser Raman spectroscopy and pesticide residues, which is applied in the directions of measuring devices, Raman scattering, and material excitation analysis, can solve the problems of inability to detect pesticide residues in fruits and vegetables, difficulty in overcoming the influence of fluorescence effects, and sensitivity limitations. Low power consumption, easy to carry, avoid stray light effect

CN102565023BInactive Publication Date: 2014-01-15EAST CHINA JIAOTONG UNIVERSITY
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  • Device and method for fruit and vegetable pesticide residues based on laser Raman spectrometer
  • Device and method for fruit and vegetable pesticide residues based on laser Raman spectrometer
  • Device and method for fruit and vegetable pesticide residues based on laser Raman spectrometer

Examples

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Effect test

Embodiment 1

[0034] Embodiment 1, a kind of fruit and vegetable pesticide residue rapid detection device based on laser Raman spectrum, comprises hardware device and software system; Wherein: software system comprises Raman spectrum acquisition module, analysis module and fingerprint library module; Hardware device comprises Raman Probe, Raman spectrum detector and data acquisition device; Raman probe includes laser 4, optical fiber 5, fastening nut 6, lens 7, bandpass filter 8, dichroic filter 9, sample holder 11, probe Shell 13, mirror 14; Raman spectrum detector includes: fiber coupler 15, lens 7, pinhole 16, focusing mirror 17, collimating mirror 18, grating 19, detector 20, cut-off filter 21; Data acquisition The device includes: data line 22, processor 3, RS232 cable 2 and display screen 1; display screen 1, RS232 cable 2, processor 3, laser 4, optical fiber 5, fastening nut 6, lens 7, sample holder 11 , probe housing 13, mirror 14, fiber coupler 15, aperture 16, focusing mirror 17, ...

Embodiment 2

[0035]Embodiment 2. A rapid detection device for pesticide residues in fruits and vegetables based on laser Raman spectroscopy, wherein: display screen 1, RS232 cable 2, processor 3, laser 4, optical fiber 5, fastening nut 6, lens 7, sample holder 11. The probe housing 13, reflector 14, fiber coupler 15, small hole 16, focusing mirror 17, collimating mirror 18, grating 19, detector 20, cut-off filter 21, and data line 22 are all fixed on the housing 12 The display screen 1 is connected to the processor 3 through the RS232 cable 2, the processor 3 is connected to the cut-off filter 21 through the data line 22, the cut-off filter 21 is arranged on the detector 20, the laser 4 is connected to the optical fiber 5, and the optical fiber 5 Fixed on the probe housing 13 by the fastening nut 6, the lens 7, the bandpass filter 8, the dichroic filter 9, the ground glass 10, the reflector 14, the bandpass filter 8, and the lens 7 are fixed on the On the probe shell 13, a sample is arrang...

Embodiment 3

[0036] Embodiment 3. A rapid detection device for pesticide residues in fruits and vegetables based on laser Raman spectroscopy, wherein: a small hole 16 is provided between the two lenses 7 provided on the other side of the fiber coupler 15 and the other lens 7 .

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Abstract

The invention relates to a device and a method for fruit and vegetable pesticide residues based on a laser Raman spectrometer. With the development of agricultural technology, various pesticides are used for prevention of fruit and vegetable pests in order to meet people's requirements in daily life by efficiently producing the fruits and vegetables with high yield, thus pesticide residues are formed on the surfaces of the fruits and vegetables unavoidably. The device for fruit and vegetable pesticide residues based on the laser Raman spectrometer comprises a display screen, a RS232 cable, a processor, a laser device, optical fibers, clamp nuts, a lens, a sample support, a probe housing, a reflective mirror, an optical fiber coupler, a pinhole, a focus lens, a collimating lens, optical gratings, a detector, a cut-off optical filter and a data line which are all fixed on the casing of the device. The device for fruit and vegetable pesticide residues based on the laser Raman spectrometer has the advantages of being compact in structure, low in power dissipation, high in stability, convenient to carry, and suitable for field detections. During detection, no movement of the device is needed, detection results are not affected by external vibrations, and the detection precision and speed are high.

Description

technical field [0001] The invention relates to a rapid detection device for agricultural pesticide residues in the field of agriculture, in particular to a rapid detection device and method for pesticide residues in fruits and vegetables based on laser Raman spectroscopy. Background technique [0002] With the development of agricultural technology, in order to produce various fruits and vegetables with high yield and high efficiency to meet people's daily needs, various pesticides are used to prevent and control pests and diseases of fruits and vegetables, so it is inevitable to form pesticide residues on the surface of fruits and vegetables. Excessive pesticide residues not only endanger the safety of consumers, but also become a green trade barrier that hinders the export of agricultural products in my country. [0003] The high-precision analytical instruments equipped in the agricultural product testing center are highly sensitive, highly specialized, and have complex ...

Claims

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Application Information

Patent Timeline
15 Jan 2014
Publication
CN102565023B
IPC
G01N21/65; G01N21/15
Inventors
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