Nano sensitive material of carbamic acid ester pesticides

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...

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, Applied Chemistry, 2009, 26(10): 1222-1226), liquid-mass spectrometry (Sun Tao et al. Rapid determination of seven carbamate pesticide residues in vegetables by ultra-high performance liquid chromatography 2 tandem mass spectrometry, Analytical Laboratory, 2010, 29(4): 87-91), electrochemical method (Hu Qinqin et al., ELISA and electrochemistry Determination of Carbamate Pesticide Residues in Scallions by Chemical Method, Pesticides, 2009, 48(5): 352-359), Enzyme Inhibition Method (Wang Zhibo, Determination of Vegetable Organophosphorus and Carbamate Pesticide Residues by Enzyme Inhibition Method, Changjiang Vegetables (Academic Edition), 2009 (18): 73-74) and spectrophotometry (Wang Jiaying et al., Research on rapid detection methods of dithiocarbamate pesticide residues in tea and other agricultural products, Chinese Journal of Food Hygiene, 2009 , 21(6):501-504), etc., because these methods require pre-enrichment and appropriate treatment to complete the determination through large analytical instruments, so it is time-consuming and difficult to promote