Light addressing molecular imprinting array sensor for distinguishing residual pesticides

An array sensor and molecular imprinting technology, applied in the direction of material electrochemical variables, etc., to achieve the effect of easy replacement, convenient self-alignment, and small size

Active Publication Date: 2011-06-22
INST OF ELECTRONICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Research in this area is still in the exploratory stage. Different functional monomers, catalysts, plasticizer materials, and sol and polycondensation conditions have a lot of room for research.

Method used

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  • Light addressing molecular imprinting array sensor for distinguishing residual pesticides
  • Light addressing molecular imprinting array sensor for distinguishing residual pesticides
  • Light addressing molecular imprinting array sensor for distinguishing residual pesticides

Examples

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Embodiment Construction

[0087] The working electrode of the optical addressing potential sensor of the present invention is a silicon-based array microstructure electrode, and the surface of the electrode is modified with various molecularly imprinted sensitive films that can specifically identify residual organic phosphorus, carbamate and other pesticides. Measuring cell for optically addressable potentiometric sensors, made of plexiglass, including cover, measuring cell base and sealing gasket (see Figure 3a , Figure 3b , Figure 3c ).

[0088] Measuring pool base assembly 2 is a plexiglass base 10, and its shape is a round cup ( Figure 3a ), whose dimensions are:

[0089] The shape of the round cup is Φ50mm×25mm, and the mouth of the cup has an external thread 13 of M42mm and 5mm in height;

[0090] A 5×7 infrared LED matrix light source 11 is inlaid in the center of the bottom of the round cup. The infrared LED matrix light source 11 is a commercial product with an overall size of 14.70mm×...

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Abstract

The invention discloses a light addressing molecular imprinting array sensor for distinguishing residual pesticides, which is composed of a light addressing molecular imprinting array chip and a measuring cell of a light-addressable potentiometric sensor, wherein, the array chip based on a micro-electromechanical system (MEMS) technology is a silicon substrate microstructural array; a sol-gel molecular imprinting method is adopted on the surface of an array sensitive area of the chip to modify tetraethoxysilane, thus molecular imprinting sensitive membranes of various pesticides with the residues, such as organophosphorus, carbamic acid ester and the like can be distinguished; the measuring cell is made of organic glass, and comprises an upper cover, a measuring cell base and a seal rubber ring; the array chip can be arranged inside the measuring cell base interchangeably as a working electrode; an infrared light-emitting diode (LED) array is directly embedded outside the base by sealgum, and corresponds to the array chip; the inner side part corresponding to the working electrode array chip, of the upper cover is provided with a copper-based electroplate platinum (Pt) film as a counter electrode and an inlet and outlet pipeline; and the ring-shaped upper cover and the periphery of the measuring cell base are provided with screw threads, and the ring-shaped upper cover and themeasuring cell base are sealed into the measuring cell through the seal rubber ring.

Description

technical field [0001] The invention belongs to the technical field of molecularly imprinted sensitive membranes and electrochemical sensors for light addressing detection, and in particular relates to a light-addressed molecularly imprinted array sensor for specifically identifying residual pesticides. Background technique [0002] The light-addressing molecular imprinted array sensor for specifically recognizing residual pesticides proposed by the present invention adopts light-addressing detection technology. This light addressable detection technology is based on Light Addressable Potentiometric Sensor (LAPS), which was invented by a molecular device company in California, USA in the late 1980s. LAPS has the advantages of wide application range, strong optical addressing ability, extremely high sensitivity, high stability, less sample required, wide measurement range, and short detection time, and has become a new star in biosensing technology. The basic structure of LA...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/26
Inventor 夏善红韩泾鸿任振兴边超卞贺明
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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