共查询到17条相似文献,搜索用时 46 毫秒
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光纤化学传感器分子探针的固定方法 总被引:3,自引:0,他引:3
本文综述分子探针在光纤化学传感器探头上的固定方法,按照其结合方式可分为物理方法和化学方法,分别综述了它们的特点及实际。引用文献24篇。 相似文献
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PBA光纤化学传感器在线监测家兔口服呋喃妥因的尿药浓度 总被引:1,自引:0,他引:1
芘丁酸光纤化学传感器(PBA—FOCS)用于在线测定家兔口服呋喃妥因后排出尿液中的药物浓度。方法的检出限为1.3μg/mL,线性范围1~100μg/mL,精密度(RSD)1.5~3.5%,回收率在95.0~100%之间。4只雄性家兔的尿药浓度—时间曲线显示达峰时间为3.5h,6h累积尿药排出百分率为21%。实验结果显示传感器、测定池和仪器系统设计合理。可实时、在线测定生物体液中的药物浓度并达到实用水平。 相似文献
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化学传感器和纳米传感器新材料的应用现状 总被引:2,自引:0,他引:2
对近年来化学传感器的应用和纳米传感器材料制备的进展作了评述。特别对一些新型化学传感器的应用及纳米传感新材料制备的新发展作了重点介绍。引述文献31篇。 相似文献
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三杯法探讨基于荧光多猝灭响应原理光纤化学传感器的响应机制 总被引:2,自引:0,他引:2
采用直角三杯法结合荧光分光光度计扫描图谱,观察5种无机离子对敏感膜光谱的影响,探讨5种离子引起膜荧光猝来的不同因素,包括动态猝灭,内过滤,共振能量转移等因素中一种或几种之和,图法了量化的各猝灭因素的大小。 相似文献
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本文介绍了光导纤维化学传感器的基本原理,传光型和传感型化学传感器的各种探头设计和构型,以及它们在无机和有机分析方面的应用。涉及参考文献105篇。 相似文献
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亚硫酸根离子对固定于聚氯乙烯(PVC)膜中的5,10,15,20四苯基卟啉(TPP)/t(2,6二氧异丁基)β环糊精(DOBβCD)有可逆荧光熄灭作用。据此研制成测定亚硫酸根离子浓度的荧光化学传感器,该传感器敏感膜最佳组成质量分数为PVC308%,BOS615%,TPP150%,DOBβCD620%。在pH=65的KOHKH2PO4缓冲溶液底液中测定亚硫酸根离子,其线性响应范围为622×10-6~311×10-4mol/L,检测限为780×10-7mol/L,其响应时间小于40s。其它常见阴离子和阳离子不干扰测定。可用于实际样品中亚硫酸根离子含量的测定。 相似文献
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Development of an Optical Fiber Lactate Sensor 总被引:1,自引:0,他引:1
Lactate analysis is important in clinical diagnostics and the food industry. An ultrasensitive optical fiber lactate sensor with rapid response time and 50?μm size has been developed. Lactate dehydrogenase (LDH) has been directly immobilized onto an optical fiber probe surface through covalent binding mechanisms. The optical fiber surface is initially activated by silanization, which adds amine groups (–NH2) to the surface. Aldehyde functional groups (–CHO) are then affixed to the optical fiber surface by employing a bifunctional cross-linking agent, glutaraldehyde. The amino acids of LDH enzyme molecules readily attach to these free -CHO groups on the fiber surface. Optimal immobilization of LDH occurs between 19 and 23 hours of exposure in the enzyme solution. The immobilized LDH enzyme molecules on the fiber surface show high enzymatic activity. The lactate sensor is able to detect lactate with a concentration detection limit of 0.5?μM and the absolute mass detection limit is 8.75 attomoles. Moreover, the sensor rapidly responds to lactate changes and exhibits good reproducibility. The lactate sensor is extremely selective. This immobilized enzyme sensor has been applied to accurately determine the lactate content in food samples. 相似文献
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聚偏氟乙烯膜光导纤维乙醇传感器的研制冯业铭1*康琪2王永志1(1中国矿业大学煤综合利用系徐州221008,2山东矿业学院济南分院化工系济南)关键词乙醇,传感器,聚偏氟乙烯膜,光导纤维1996-03-19收稿,1996-07-26修回光导纤维化学传感器... 相似文献
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阵列传感器采用人工模拟嗅觉系统的传感模式,实现多点信息的同时获取,极大地提高了分析效率,在公共安全、环境监测、医学检测等领域具有广阔的应用前景。其中,光化学阵列传感器因灵敏度高、输出信号丰富等优点而备受关注。近年来,为了进一步提高阵列传感器的识别能力和灵敏度,功能化纳米材料被广泛应用于光化学阵列传感器以增加传感材料的种类和发展新的传感方法。本文按照使用的光谱检测技术不同,详细介绍了功能化纳米材料在荧光、比色、催化发光和多通道阵列传感器等4类光化学阵列传感器中的应用。 相似文献
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Gojon Christine Duréault Bernard Hovnanian Nadine Guizard Christian 《Journal of Sol-Gel Science and Technology》1999,14(2):163-173
Original hybrid organic-inorganic materials have been synthesised, characterised and used as optical chemical hydrazine sensors. Because of its optical and chemical properties, 4-(dimethyl)aminobenzaldehyde (DMAB) was chosen as indicator. DMAB has been immobilised by physical entrapment in a microporous silica network or by a chemical bonding on a colloidal silica network. The response time of the sensor was essentially governed by the diffusion of hydrazine in the host matrix whereas its life time was dependent on the retention of DMAB. These two features were controlled by the nature and the quantity of the network agent and the catalyst, by the ageing time of the sol, and the drying and thermal treatment of the films. 相似文献