共查询到17条相似文献,搜索用时 109 毫秒
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分子印迹技术研究进展 总被引:3,自引:0,他引:3
分子印迹技术是一项新兴的分子识别技术,由于其卓越的分子识别功能,势必会形成一个崭新的技术群体.该文较系统地介绍和综述了分子印迹聚合物的制备、选择性结合特性及应用等方面的研究进展. 相似文献
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烟酸分子印迹聚邻氨基酚敏感膜传感器的研制 总被引:2,自引:0,他引:2
研制了电化学聚合制备烟酸分子印迹聚邻氨基酚敏感膜传感器,并对分子印迹膜的结构和性能进行了探讨与研究.在弱酸性条件下,以邻氨基酚为单体,烟酸为模板分子,用循环伏安法电聚合成膜制备传感器.该传感器对烟酸具有良好选择性和敏感度,用恒电位计时安培法,烟酸浓度在2.0~5.0 mmol/L范围内与电流增量成线性关系,加标回收率在92%~104%之间. 相似文献
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中国工业快速发展伴随而来的水质重金属污染问题正日益影响着人们的正常生活,寻求快速准确的水质重金属检测方法是十分迫切的.众多水质检测传感器中,电化学传感器具有检测灵敏、操作简单、成本低、便携等优势,在水质重金属检测领域占据了十分重要地位,拥有广阔的前景.本文重点介绍了用于水质重金属检测的几种电化学传感器,包括它们的构造、分类及其检测原理.并对应用于水质重金属检测的电流型电化学传感器和电位型电化学传感器进行了详细说明,介绍了阳极溶出伏安法和离子选择性电极法在内的几种电化学分析方法,以及近年来相关研究的现状. 相似文献
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水质检测传感器主要包括化学水质检测传感器、生物学水质检测传感器、光学水质检测传感器和谐振式水质检测传感器四类。综述了水质传感器的原理、应用、研究现状和各自的特点,对水质检测传感器现存的问题进行了阐述。对我国生活饮用水卫生标准的主要常规指标进行了介绍,并与其它国家的几种主要用水标准进行了对比。 相似文献
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Sadaf Yaqub Usman Latif Franz L. Dickert Author vitae 《Sensors and actuators. B, Chemical》2011,160(1):227
Self-organization of monomers around template molecules, in bulk MIP generation, leads to selective molecular imprints with high sensitivity. Employing the host–guest chemistry, novel artificial receptors were fabricated via in situ MIP synthesis directly on gold electrodes of piezoelectric transducers (quartz crystal microbalance, QCM). The resultant label-free and robust biomimetic sensing material shows reversible as well as selective sensor responses for chlorotriazines moieties with minor structural differences. A detection limit of 20 ppb for atrazine was attained while showing selectivity up to 9 times higher than its metabolites des-ethyl-atrazine (DEA), des-isopropyl-atrazine (DIA), des-ethyl-des-isopropyl-atrazine (DEDIA) and structural analogues like simazine (SIM) and propazine (PRO). Furthermore, imprinted nanoparticles give linear characteristics over the wide range and show no saturation effects in comparison to bulk materials. 相似文献
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Development of a molecular imprinting thick film electrochemical sensor for cholesterol detection 总被引:1,自引:0,他引:1
A combined molecular imprinting and thick film electrochemical sensor for cholesterol concentration detection had been developed. The ferro-ferric cyanide coupled redox reaction was used as the means to quantify the cholesterol presented in the test medium. This electrochemical sensor employed a modified gold working electrode, a platinum counter electrode and an Ag/AgCl reference electrode. The alkanethiol was used to form the self-assembled monolayer (SAM) on the gold working electrode. The SAM was then used with the cholesterol as the template forming the molecular imprinting layer. This sensor prototype could detect cholesterol concentrations between 66 and 700 nM and only a 1 μL of the sample volume was required. 相似文献
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Dongxia NieAuthor VitaeDawei JiangAuthor Vitae Dan ZhangAuthor VitaeYing LiangAuthor Vitae Ying XueAuthor VitaeTianshu ZhouAuthor Vitae Litong JinAuthor VitaeGuoyue ShiAuthor Vitae 《Sensors and actuators. B, Chemical》2011,156(1):43-49
In this work, we demonstrated a sensitive and selective electrochemical sensing protocol for the detection of TNT prepared from alkanethiols self-assembled on AuNPs modified glassy carbon (GC) electrode with preadsorbed templates of TNT. It demonstrated that the 2D molecular imprinting monolayers (MIMs) can provide a better site accessibility and lower mass-transfer resistance, while the AuNPs can enhance electrode conductivity, facilitate the electron transfer and increase the amount of TNT-imprinted sites. The prepared sensor showed not only high selectivity toward TNT in comparison to other similar nitroaromatic compounds (NACs), but also a wide linear range over TNT concentration from 4.0 × 10−8 to 3.2 × 10−6 M with a detection limit of 1.3 × 10−8 M (S/N = 3). Moreover, the imprinted sensor has been applied to the determination of TNT in spiked environmental water samples and shows promise for fast and sensitive measurement of trace levels of TNT in real samples. 相似文献
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数据融合是能源有限的无线传感器网络应用中必不可少的信息处理手段.目前的数据融合方法多着眼于固定参与节点数目下的数据融合,由于融合时数据传输量与参与节点数目呈正比,所以,最佳的节能策略应是满足一定性能条件下参与节点数目可变.将序贯检测理论应用于无线传感器网络数据融合问题上,并建立其数学模型.考虑无线信道的衰减和物理层调制解调特性,进一步提出基于序贯检测的无线传感器网络数据融合判决(WDASD)方法,并通过仿真实验验证了WDASD算法的性能. 相似文献