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

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 ...

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Problems solved by technology

[0005] Experts from Germany, Israel and New Zealand applied near-infrared spectroscopy technology to develop portable detection equipment, which realized rapid detection of fruit sugar content, defects, maturity, etc., but due to weak signal and low measurement accuracy, it cannot be used for Detection of Pesticide Residues in Fruits and Vegetables

[0006] Patent CN101059439A adopts the method of mediating the inner core of multi-mode quartz fiber to obtain laser Raman spectrum. Due to the moving parts, the detection accuracy is affected by factors such as vibration; Photomultiplier tubes and photon counters are used as detectors, which can only detect electronic vibrations, and the sensitivity of detection is limited

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