Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Sulfur-containing organic phosphorus pesticide sensor and preparation and application thereof

A sensor and organophosphorus technology, which is applied in the field of detection of sulfur-containing organophosphorus pesticides, can solve the problems of time-consuming, false positive, cumbersome operation process, etc., and achieve the effects of improving detection sensitivity, portability, and low price

Active Publication Date: 2016-12-07
中科(大连)快检科技有限公司
View PDF6 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, instrumental analysis methods, such as gas chromatography, liquid chromatography, mass spectrometry, etc., can meet the detection requirements for the national standard limit of organophosphorus pesticides, but the operation process is cumbersome and time-consuming, and large-scale experiments cannot be carried out; The preparation process of the required specific antibody is complicated, and it is impossible to prepare a specific antibody for each pesticide; while the enzyme inhibition method is relatively simple, but it is prone to false positive and false negative results, leading to misjudgment, and most of the organophosphorus Pesticide response sensitivity is low

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Sulfur-containing organic phosphorus pesticide sensor and preparation and application thereof
  • Sulfur-containing organic phosphorus pesticide sensor and preparation and application thereof
  • Sulfur-containing organic phosphorus pesticide sensor and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of sulfur-containing organophosphorus pesticide sensor: Weigh 5 mg of palladium chloride in 1 mL of acidic silica gel sol-gel A (tetraethoxysilane: ethylene glycol methyl ether: propylene glycol methyl ether acetate: chloroform: acetic acid: koji Laton X-100: water is mixed at a volume ratio of 1:2:2:0.8:0.1:0.03:0.8, hydrolyzed at 60°C for 4 hours to obtain acidic silica gel sol-gel solution A), dissolved by ultrasonication, and then used a pipette gun Draw 1 μL of the above solution, drop-coat it on a porous filter paper with a pore size of 0.22 μm, and dry it at room temperature under the protection of nitrogen to prepare a colorimetric sensor for sulfur-containing organophosphorus pesticides.

Embodiment 2

[0032] The enrichment effect of the colorimetric sensor for sulfur-containing organophosphorus pesticides: represented by dimethoate in the sulfur-containing organophosphorus pesticides, the results are as follows figure 1 shown. It can be seen that when 200 μL of the dimethoate solution containing 1 ppm is initially dropped on the sensor, the color change of the indicator is weak, and as the volume of the added pesticide increases, the color change of the sensor gradually increases, indicating that through enrichment, the color change of the sensor can be greatly improved. The detection sensitivity of the sensor. In order to clearly distinguish the reaction, 1000 μL of the pesticide solution was used as the enrichment volume in the experiment of investigating the selectivity of the sensor and establishing the standard concentration curve in the following examples.

Embodiment 3

[0034] Selectivity of sulfur-containing organophosphorus pesticide sensors to different types of pesticides: A flatbed scanner was used to record images before and after the sensor reacted with pesticides. The pre-reaction image was defined as the sensor soaked with 1000 μL pure water, and the post-reaction image was defined as the sensor after reacting with different kinds of 1000 μL pesticides. Digitalize the color of the image before and after the reaction with Photoshop software, extract the red, green and blue (RGB) channel values, and subtract the color values ​​of each channel before and after the reaction to obtain the color change values ​​​​ΔR, ΔG, and ΔB of each channel, and then use the formula Calculate the color change value ED before and after the sensor reacts with different types of pesticides, such as figure 2 shown. From figure 2It can be seen that the sensor is sensitive to 1ppm of sulfur-containing organophosphorus pesticides (such as fenthion, chlorp...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a sulfur-containing organic phosphorus pesticide sensor and preparation and application thereof. The sulfur-containing organic phosphorus pesticide sensor is prepared according to principles that metal salt indicators capable of responding to characteristic groups P=S or P-S of sulfur-containing organic phosphorus pesticides are immobilized on porous materials, coordination effects between the metal salt indicators and the groups P=S or P-S are realized so that colors of the indicators can be changed. The sulfur-containing organic phosphorus pesticide sensor, the preparation and the application have the advantages that the sensor is high in sulfur-containing organic phosphorus pesticide sensitivity and selectivity, can obviously respond to various sulfur-containing organic phosphorus pesticides with the concentration level of 1 ppm or above under enrichment effects of the sensor, and is free of reaction with other pesticides even under the condition of the concentration level of 5 ppm; color change of the indicator is in excellent linear relations with the concentration of the pesticides, and accordingly the sulfur-containing organic phosphorus pesticides can be quantitatively detected by the aid of the sensor; the sensor prepared by the aid of the method is easy and convenient to operate and applicable to quickly detecting the sulfur-containing organic phosphorus pesticides in fields.

Description

technical field [0001] The invention belongs to the technical field of detection of sulfur-containing organophosphorus pesticides. In particular, it relates to a novel colorimetric sensor for sulfur-containing organophosphorus pesticides, through the enrichment performance of the sensor, rapid and high-sensitivity detection of sulfur-containing organophosphorus pesticides is realized. Background technique [0002] In just a few decades from the 1940s to the mid-1980s, organophosphorus pesticides emerged and took the lead in the global pesticide market. However, as human beings pay attention to the environment and their own health, highly toxic organophosphorus pesticides have been eliminated and replaced by highly efficient and low-toxic organophosphorus pesticides. However, due to the long-term use of this type of pesticides due to the problem of drug resistance, the amount of use and the frequency of application have been increasing, and acute poisoning incidents caused b...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01N21/78G01N1/40
CPCG01N1/405G01N21/78
Inventor 冯亮张雨
Owner 中科(大连)快检科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com