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Rapid detection of pesticide residues in Chinese herbal medicines by molecularly imprinted membrane electrospray ionization mass spectrometry

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Chinese Chemical Letters 2021年第7期32卷 2174-2178页

作者： Chunmei Wu Tianyi Li Dongju Li Shanshan Jia Jianmei Huang Haimin Lei Mei Zhang School of Chinese Materia Medica Beijing University of Chinese MedicineBeijing 102488China National Institute for Communicable Disease Control and Prevention Chinese Center for Disease Control and PreventionBeijing 102206China Experimental Teaching Center School of Basic Medical SciencesFudan UniversityShanghai 200032China

Chinese herbal medicines(CHMs)play an increasingly important role in the field of medicine and affects public health in the world.Although more and more strict has been employed to ensure the quality and safety of CHMs,pesticide residues in CHMs remain a serious issue and are the bottleneck for the global development of CHMs.In this work,we applied molecularly imprinted membrane electrospray mass spectrometry(MIM-ESI MS)for rapid detecting 4 classes of pesticide residues in CHMs,including organophosphorus(OPP),carbamates,pyrethroids and neonicotinoids in CHMs.Compared with our previous ambient ionization method MESI,MIM-ESI is capable of achieving a~50-fold increase in the detection limit of conventional analytical methods owing to the specificity recognition and unique enrichment of MIM.The optimal experimental conditions were determined,and the method was further validated for its sensitivity and specificity.Our data showed that MIM-ESI MS is applicable for the direct quantitation of pesticide residues in CHMs.This detection technology may help to ensure the quality of CHMs in the future.

关键词： Pesticides residue Chinese herbal medicines(CHMs) Rapid detection molecularly imprinted membrane Ambient ionization Mass spectrometry

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Towards the development of a portable sensor based on a molecularly imprinted membrane for the rapid determination of salbutamol in pig urine

Towards the development of a portable sensor based on a mole...

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中国畜牧兽医学会家畜内科学分会第七届代表大会暨学术研讨...

作者： Chunyan Chai,Guoyan Liu*,Feng Li,Xiaofang Liu,Bing Yao,Li Wang School of Agriculture & Biology,Shanghai Jiaotong University,800# Dongchuan Road,Shanghai 200240,China

A new type of conductometric probe based on a molecularly imprinted membrane(MIM) for the detection of salbutamol has been designed and fabricated.The probe consists of two parallel screen-printed electrodes(SPE).One of the SPEs was coated with a molecularly imprinted membrane using salbutamol as the template,and the other was modified with a non-molecularly imprinted membrane(N-MIM). Measurements of salbutamol were conducted after the conductometric probe had been connected to a commercial portable conductometer.Multi-sample or successive detections could be easily accomplished by replacing the one-off SPE coated with the salbutamol molecularly imprinted membrane with a new one.The conductometric response of the sensor to the concentration of salbutamol displayed a linear correlation over a range from 50 to 280 nM,with a detection limit of 13.5 nM.The recoveries reached 92.1 -98.3%based on pig urine samples.In addition,the sensor based on this new type of probe demonstrated high sensitivity and selectivity for salbutamol.

关键词： Salbutamol molecularly imprinted membrane Urine Conductometry

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Grafting of MIPs from PVDF membranes via Reversible Addition-fragmentation Chain Transfer Polymerization for Selective Removal of p-Hydroxybenzoic Acid

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Chemical Research in Chinese Universities 2018年第6期34卷 1051-1057页

作者： DONG Yanying YU Ping SUN Qilong LU Yang TAN Zhenjiang YU Xiaopeng School of Computer Science Key Laboratory of Numerical Simulation of Jilin Province School of Management Jilin Normal University Siping 136000 P. R. China

Effective molecularly imprinted membranes（MIMs） were developed as an efficient adsorbent for the selective removal ofp-hydroxybenzoic acid（p-HB） from acetylsalicylic acid（ASA, aspirin）. The MIMs were grafted successfully from poly（vinylidene fluoride） microfiltration membranes via reversible addition-fragmentation chain transfer（RAFT） polymerization. The graft copolymerization of acrylic acid（AA） in the presence of template p-hydroxybenzoic acid led to molecularly imprinted polymer（MIP） film coated membranes. The obtained MIMs were characterized by scanning electron microscopy（SEM）, Fourier transform infrared spectrophotometer（FTIR） and Raman spectra, and batch mode adsorption studies were carried ont to investigate the specific adsorption equilibrium, kinetics and selective recognition properties of different MIMs. The kinetic properties of the MIMs could be well described by the pseudo-second-order rate equation. Selective permeation experiments were performed to evaluate the permeation selectivity of the p-HB imprinted membranes. The observed performances of the MIMs are applicable to the further purification of aspirin. Keywords Acetylsalicylic acid; Reversible addition-fragmentation chain transfer; molecularly imprinted membrane; p-Hydroxybenzoic acid; Selective adsorption

关键词： Acetylsalicylic acid Reversible addition-fragmentation chain transfer molecularly imprinted membrane p-Hydroxybenzoic acid Selective adsorption

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L-色氨酸分子印迹乳胶膜的制备及性能研究

L-色氨酸分子印迹乳胶膜的制备及性能研究

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2010年全国高分子材料科学与工程研讨会

作者：林美娜陈丽娜李晓张卫英福州大学化学化工学院

＜正＞分子印迹膜（MIM）作为一种新型分离手段,兼具分子印迹技术对特定分子的专一识别性与膜分离技术的操作简单、易于连续化等优点,现已在手性分离、固相萃取、仿生传感等领域取得广泛的开发与应用。

关键词： Core-shell emulsion Emulsion blending molecularly imprinted membrane

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