In-situ acquisition and detection device and method for pesticide residues on fruit surface

A pesticide residue and detection device technology, which is applied to measuring devices, instruments, and material analysis through optical means, can solve the problems of unrealized fully automatic detection and inability to extract pesticide residues from fruit samples, and achieve less other reagents and small volume , the effect of small sample size

Active Publication Date: 2019-07-23
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

[0008] However, most of the current microfluidic detection methods for pesticide residues cannot extract pesticide residues from fruit samples. They just inject the pre-extracted and pretreated fruit sample liquid containing pesticide residues into the microfluidic chip for detection, which has not been realized. Fully automated detection

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  • In-situ acquisition and detection device and method for pesticide residues on fruit surface
  • In-situ acquisition and detection device and method for pesticide residues on fruit surface

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Embodiment Construction

[0033] The present invention will be described in further detail below in conjunction with specific embodiments.

[0034] Such as figure 1 shown. The invention discloses an in-situ collection and detection device for pesticide residues on fruit surfaces, which comprises a sample flushing module 1, an ultrapure water pool 2, a surface-enhanced Raman base pool 3, a first metering micropump 4, a second metering micropump 5, a Man detection area 6, third metering micropump 7, waste liquid pool 8, Raman spectrometer 9, computer 10;

[0035] The sample flushing module 1 includes: a flushing bracket 11, a liquid collection pool 13, and a sampling pool 14 arranged sequentially from top to bottom;

[0036] A plurality of nozzles 22 are arranged around the inner bottom of the scouring bracket 11; a filter tank 12 is provided at the connection between the upper part of the liquid collection pool 13 and the scouring bracket 11;

[0037] The ultrapure water pool 2 and the surface-enhanc...

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Abstract

The invention discloses an in-situ acquisition and detection device and method for pesticide residues on the fruit surface. In the detection process of the device, a computer turns on a first meteringtype micropump to control a switch of a surface enhanced Raman substrate pool, so that an enhancer flows into a sample washing module to wash the surface of a sample; when 10 mL of sample liquid is accumulated, the computer controls to turn off the first metering type micropump, and turn on a second metering type micropump and a valve, so that the sample liquid flows into a Raman detection area through a micropipe; a Raman spectrometer detects a Raman spectrum signal of pesticide in the sample liquid in a microfluidic chip; and the computer analyzes the Raman spectrum signal to determine thepesticide residue of the sample.

Description

technical field [0001] The invention relates to the field of pesticide residue detection, in particular to a device and method for in-situ collection and detection of pesticide residues on fruit surfaces. Background technique [0002] Pesticides play an essential role in my country's agricultural production, including insecticides, herbicides, fungicides, rodenticides and plant growth regulators. However, the unreasonable use of pesticides and fertilizers for a long time (such as not strictly implementing the withdrawal period or excessive use of pesticides, etc.) has caused pesticide residues in agricultural products to exceed the standard. Although long-term consumption of agricultural and sideline products with excessive pesticide residues will not cause acute poisoning, it may cause chronic poisoning, cause disease, and even affect the next generation; in addition, with the improvement of people's living standards, consumers are not only concerned about food Taste and n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65
CPCG01N21/658
Inventor 孙大文吴蕾蕾蒲洪彬韦庆益
Owner SOUTH CHINA UNIV OF TECH
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