Nano sensitive material of carbamic acid ester pesticides

A technology of carbamates and sensitive materials, applied in the field of doping nano-sensitive materials, can solve the problems of unscientific, human and animal poisoning, time-consuming and difficult to popularize, etc.

Inactive Publication Date: 2010-11-17
BIOCHEM ENG COLLEGE OF BEIJING UNION UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the unscientific use of carbamate pesticides in large quantities, the phenomenon of human and animal poisoning has occurred from time to time, so many countries and regions have set strict limits on the residues of this kind of pesticides in food, which makes carbamate The analysis and detection of ester pesticides has attracted much attention
[0004] The determination methods of carbamate pesticides mainly contain gas chromatography (Qu Tianyao et al., Gas Chromatography Rapid Detection of Organic Phosphorus, Organic Nitrogen and Carbamate Pesticide Residues in Grains, Pesticide Science and Management, 2009, 30(6 ): 26-40), liquid chromatography (Mao Xiuhong et al., Determination of 13 kinds of carbamate pesticide residues in Chinese medicinal materials by high performance liquid chromatography-post-column derivatization-fluorescence detector, Chinese patent medicine, 2010, 32(3): 454-459), mass spectrometry (Liang Huazheng et al., rapid detection of trace carbamates in vegetables by surface desorption chemical ionization mass spectrometry,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] (1) 120g manganese acetate tetrahydrate (Mn(CH 3 COO) 2 4H 2 O), 155g chromium chlorate hexahydrate (Cr(ClO 4 ) 3 ·6H 2 O) and 31g lead nitrate (Pb(NO 3 ) 2 ) were dissolved in 300mL deionized water in turn, 100g of citric acid was added under high-speed stirring, and the pH value was adjusted to 1.8 with ammonia water, and the stirring was continued for 5 hours. The glue was dried by infrared for 1.5 hours, after being fully ground, the temperature was raised to 650°C at a rate of no more than 5°C per minute in a high-temperature box-type resistance furnace, and the temperature was maintained for 2 hours to obtain MnO 2 、Cr 2 o 3 and PbO nanopowder;

[0013] (2) Palladium chloride 2g (PdCl 2 ) was dissolved in 10% hydrochloric acid aqueous solution, and under constant stirring, the above-mentioned nanopowder body dispersed by ultrasonic waves was added therein, continued stirring and dripping 10mL of 45% hydrazine hydrate (N 2 h 4 ·H 2 O) aqueous solution,...

Embodiment 2

[0017] (1) 135g manganese sulfate hydrate (MnSO 4 ·7H 2 O), 155g chromium acetate hydrate (Cr(CH 3 COO) 3 ·6H 2 O) and 31g lead nitrate (Pb(NO 3 ) 2 ) were dissolved in 300mL deionized water in turn, 100g of citric acid was added under high-speed stirring, and the pH value was adjusted to 2.0 with ammonia water, and the stirring was continued for 7 hours, left to stand for aging, and the solution was rotary evaporated at 80°C to obtain a gel. The glue was dried by infrared for 1.5 hours, after being fully ground, the temperature was raised to 670°C at a rate of no more than 5°C per minute in a high-temperature box-type resistance furnace, and the temperature was maintained for 3 hours to obtain MnO 2 、Cr 2 o 3 and PbO nanopowder;

[0018] (2) 2g palladium chloride (PdCl 2 ) was dissolved in 12% hydrochloric acid aqueous solution, and under constant stirring, the above-mentioned nano-powders dispersed by ultrasonic waves were added therein, continued stirring and dripp...

Embodiment 3

[0022] (1) 96g manganese chloride tetrahydrate (MnCl 2 4H 2 O), 123g chromium trichloride hexahydrate (CrCl 3 ·6H 2 O) and 36g lead acetate trihydrate (Pb(CH 3 COO) 2 ·3H 2 0) Dissolve in 300mL deionized water successively, add 100g citric acid under high-speed stirring, and adjust the pH value to 2.4 with ammonia water, continue to stir for 8 hours, leave it to stand for aging, and rotate the solution at 80°C to obtain a gel. The gel was dried by infrared for 1.5 hours. After being fully ground, the temperature was raised to 680°C at a rate of no more than 5°C per minute in a high-temperature box-type resistance furnace, and the temperature was maintained for 3 hours to obtain MnO 2 、Cr 2 o 3 and PbO nanopowder;

[0023](2) 2g palladium chloride (PdCl 2 ) was dissolved in 11% hydrochloric acid aqueous solution, and under constant stirring, the above-mentioned nano-powders dispersed by ultrasonic waves were added therein, continued stirring and dripping 10mL of 50% hy...

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Abstract

The invention relates to a nano sensitive material which is used for monitoring carbamic acid ester pesticides. The nano sensitive material is characterized by comprising MnO2, Cr2O3 and PbO nano powders doped with Pd, wherein the content ranges of doped Pd, MnO2, Cr2O3 and PbO are respectively are 0.8-2.5% , 40-45%, 34-40% and 19-24%, wherein the particle size is smaller than 35 nm. A carbamic acid ester pesticide sensor made of the sensitive material provided by the invention has wide linear range, good selectivity and high sensitivity, and can be applied to the online monitoring and measurement of the carbamic acid ester pesticides without being influenced by coexisting substances.

Description

technical field [0001] The invention relates to a doped nano-sensitive material for monitoring carbamate pesticides, especially MnO doped by Pd atoms 2 、Cr 2 o 3 The sensitive material composed of PbO nanometer powder belongs to the field of sensing technology. Background technique [0002] With the development of agricultural industrialization, chemical pesticides are playing an increasingly important role in the production of agricultural products such as grain, vegetables, fruits, tea and medicinal materials in my country. However, because people do not have enough knowledge of the movement rules of pesticides in natural organisms, such as metabolic pathways, degradation methods, and residue accumulation, they often ignore the effects of chemical pesticides while enjoying the joy of harvest. harm. One of the key links to control the amount of pesticide residues in agricultural products is to conduct timely and accurate analysis and detection of pesticide residues in a...

Claims

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Application Information

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IPC IPC(8): G01N33/00G01N15/00B22F9/24
Inventor 周考文徐爽刘德兴
Owner BIOCHEM ENG COLLEGE OF BEIJING UNION UNIV
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