NIMTE OpenIR  > 2018专题
Lipase@ZIF-8 nanoparticles-based biosensor for direct and sensitive detection of methyl parathion
Ma, Baokai; Cheong, Ling-Zhi; Weng, Xinchu; Tan, Chin-Ping; Shen, Cai
2018
Source PublicationELECTROCHIMICA ACTA
Volume283Pages:509-516
AbstractOrganophosphorus pesticides especially p-nitrophenyl pesticides (methyl parathion) have neurotoxic effects and it is a difficult to remove organophosphorus pesticides residues from contaminated water. Present work has developed a sensitive, direct and rapid lipase@ZIF-8/chitosan/glassy carbon electrode (GCE) and lipase@amine-modified ZIF-8(An-ZIF-8)/chitosan/GCE biosensors for detection of methyl parathion. ZIF-8 and An-ZIF-8 nanoparticles which are a type of metal-organic frameworks with large surface area and high porosity have been facilely prepared under mild biocompatible conditions and used as lipase immobilization matrixes in the biosensors. The optimized lipase@ZIF-8/chitosan/GCE and lipase@An-ZIF-8/chitosan/GCE biosensors can detect methyl parathion with a wide linear range, good repeatability, recovery and limit of detection as low as 0.28 mu M. The as-prepared biosensors can be stored in 0.05 M PBS (pH 7) at 4 degrees C and reused for at least 20 days with a retainment of at least 80% of its initial response to methyl parathion. This indicated that both ZIF-8/chitosan and An-ZIF-8/chitosan are suitable for immobilization of lipase that favors generation of p-nitrophenol from methyl parathion; and subsequent electrochemical oxidation and electron transfer of the p-nitrophenol. (C) 2018 Elsevier Ltd. All rights reserved.
KeywordZeolitic Imidazolate Frameworks Metal-organic Frameworks Organophosphate Pesticides Biomimetic Mineralization Rapid Detection Water Extraction Efficient Hydrolase Samples
Subject AreaPhysics
Language英语
Document Type期刊论文
Identifierhttp://ir.nimte.ac.cn/handle/174433/17227
Collection2018专题
Recommended Citation
GB/T 7714
Ma, Baokai,Cheong, Ling-Zhi,Weng, Xinchu,et al. Lipase@ZIF-8 nanoparticles-based biosensor for direct and sensitive detection of methyl parathion[J]. ELECTROCHIMICA ACTA,2018,283:509-516.
APA Ma, Baokai,Cheong, Ling-Zhi,Weng, Xinchu,Tan, Chin-Ping,&Shen, Cai.(2018).Lipase@ZIF-8 nanoparticles-based biosensor for direct and sensitive detection of methyl parathion.ELECTROCHIMICA ACTA,283,509-516.
MLA Ma, Baokai,et al."Lipase@ZIF-8 nanoparticles-based biosensor for direct and sensitive detection of methyl parathion".ELECTROCHIMICA ACTA 283(2018):509-516.
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