The study of fiber optical sensors and their applicationgs in measurements of pH,dissolved oxygen & identification of herbal medicines fingerprinting

本论文由四部分组成：1.综述：光纤技术及溶胶－凝胶光纤技术2.海洋环境监测的光纤pH传感器；3.基于荧光猝灭原理的光纤化学传感器在线监测水中溶解氧；4.光纤近红外光谱在线检测中药指纹图谱。 论文的第一部分综述了光纤技术的起源、发展及其应用于化学传感器的优点；光纤化学传感器的原理特点；阐述所采用溶胶-凝胶法制备传感膜的工艺过程，包括溶胶-凝胶法的基本原理，基本工艺流程，溶胶-凝胶过程中前驱物、加水量、催化剂、pH值、控制干燥的化学添加剂和温度等参数对传感膜性能的影响。 论文的第二部分综述了近几年光纤pH传感器的研究进展，并对传感器的原理、传感材料、响应性能等方面进行了评述；在光纤pH传感器研...This dissertation consists of four parts: 1.Fiber optical sensor technology and sol-gel method;2.Fiber optical pH sensor used in inspecting seawater; 3. Fiber optical oxygen sensor based on fluorescence quench in inspecting dissolved oxygen; 4. Fiber optical near-infrared sensor in Chinese traditional medicinal classify; In the first part, a review summarized the origin, development and excellenc...学位：理学硕士院系专业：化学化工学院_分析化学学号：20002501

Determination of trace elements in seawater and application for identification of source of trace metal contaminants

利用电感耦合等离子体质谱(ICP-MS)研究了胶州湾及莱州湾这两个海域中痕量元素污染水平,发展了ICP-MS海水环境中痕量元素的测定方法,同时找出海水环境中具有保守性的数种元素作为污染示踪元素。达到对于海水环境中痕量污染物被动示踪的目的。对18个真实样品进行了识别率试验,识别率可达90%以上,在选取3个海水样品及1个河水样品混合后的模拟分担率实验,也取得了满意的结果,其误差平均值仅有1.17%。Inductively coupled plasma-mass spectrometry(ICP-MS) was developed into an accurate and sensitive technique for the multi-element determinations in a range of sample matrices.The seawater samples in Lai zhou Bay and Jiaozhou Bay as a case was studied.The distribution of trace elements in seawater can be used in the source fingerprints for the identification of seawater samples from different locations.The probability of success for the source identification by the technique is better than 90%.The feasibility of trace metals in seawater as a tracer for the tracking of pollution sources has been evaluated.Combined with the chemo-metric analysis,3 seawater and 1 river samples were mixed,the error is only 1.17%.国家863项目(2005AA635250

Recent Development and Applications of Optical and Fiber-optic pH Sensors

本文综述了光纤化学 pH传感器的现状和发展 .分别从 pH指示剂的试剂固定化方法和传感信号的产生与检测方式来阐述近年来光纤化学pH传感器新技术的发展 ;同时也介绍了其他 pH传感器的发展现状 .This article provides a brief review on the development and applications of fiber optic pH sensors in recently years. Various methods and materials, different spectroscopic methods are introduced. Several special opticaland fiber optic pH sensors are reviewed.国家“8 63”科技攻关海洋领域 (818 0 9 0 7)资助项

同位素稀释电感耦合等离子体质谱测定环境和生物样品中的镉

建立电感耦合等离子体质谱(ICP-MS)测定镉同位素比值的方法,应用同位素稀释电感耦合等离子体质谱(Id-ICP-MS)对环境和生物样品茶叶、湖沉积物和人发标准物质中的镉进行测定研究.对电感耦合等离子体质谱(ICP-MS)的工作条件和参数进行了最优化.讨论了多原子离子和同量异位素对镉同位素比值的影响,通过天然镉标准溶液对质量歧视进行了校正,并优化同位素稀释剂的加入量.将该方法应用于茶叶、人发和沉积物标准物质的测定

Applications of Organically Modified Silicate Films for Stable Optical Fibre pH Sensor With Sol-Gel Film

采用溶胶-凝胶法制备基于染料吸收原理的光纤化学pH传感膜.通过有机掺杂,获得了对溶液pH具有宽范围动态响应的敏感膜.将四乙氧基硅烷和有机硅单体水解后加入pH指示剂,铺成溶胶-凝胶薄膜.该pH传感器的pH感应范围可达到pH3~11,响应速度3min,一个月稳定性在RSD<18%.New methodology and technology of sol-gel has been successfully applied in pH sensor film preparation. The pH response range and the sensitive can be elevated by using the organic mixed silicate film. The effect of sample’s pH in the range of pH3~11,response rate at 3 min,the stability of one month is RSD<18%。With the research ,the application range of the sensor was extended, which made the sensor keep a good veracity when it was used in situ.国家“八六三”高技术计划海洋领域定型项目资助(200402

应用带八级杆碰撞/反应池(ORS)的电感耦合等离子体质谱(ICP-MS)同时测定大洋海水中的痕量元素

采用带八级杆碰撞 /反应池 (ORS)的电感耦合等离子体质谱 (ICP MS)同时测定海水中的多种痕量元素 .在碰撞池中引入氢气或者氦气 ,消除海水基体盐分带入的分子离子 ,例如ArCl+,ArNa+等对超痕量As,Cu等的干扰 .可以直接同时测定稀释海水中的多种痕量元素 ,如V ,Cr,Mn ,Fe ,Co,Ni,Cu ,Zn ,As,Cd ,Pb和U .除了样品稀释外不需要任何预处理与富集工作 ,用海水标准参考样品NASS 5进行方法验证 ,大多数元素的测定误差在 1 5 %以内

Effect of Temperature on Sensing Performance of Optical Fiber Relative Humidity Sensor Based on Nafion-crystal Violet Film

The optical fiber relative humidity sensor based on Nafion-crystal violet film was developed. The effect of samples temperature in the range from 299.15 K to 324.15 K on the sensing performance of the sensor was investigated. The mathematical function between temperature and the sensitivity of the sensor was established according to the reactive theory of sensor to the relative humidity, which was validated with the experiment. With the research, the application range of the sensor was extended, which made the sensor keep a good veracity when it was used in situ.国家“八六三”计划海洋监测技术主题项目(批准号:818-09-07)资助

Effect of temperature on sensing performance of optical fiber relative humidity sensor based on nafion-crystal violet film

The optical fiber relative humidity sensor based on Nafion-crystal violet film was developed. The effect of sample's temperature in the range from 299.15 K to 324.15 K on the sensing performance of the sensor was investigated. The mathematical function between temperature and the sensitivity of the sensor was established according to the reactive theory of sensor to the relative humidity, which was validated with the experiment. With the research, the application range of the sensor was extended, which made the sensor keep a good veracity when it was used in situ

Sol-Gel in the Applications of Optochemical Sensors

凝胶技术是一种很有发展前途的材料制备方法 ,已在材料科学及有关的许多领域中得到了广泛的重视。文章综述了溶胶 -凝胶技术的机理 ,以及传感器染料的包埋。New methodology and technology of sol-gel has been successfully applied in material preparation. This paper presents the new method of immobilization of dyes in a sensing support. The method is based on the immobilization of dye encapsulating in a sol-gel film of micrometer thickness.科技部九五攻关项目资助 (96 -A2 3- 0 2 - 0 8);; 国家“八六三”高技术计划海洋领域资助项目 (2 0 0 1AA6 35 0 40

The Synthesis of 8-Hydroxyquinoline Bonded Silica and Its Application by Flow Injection-Indutively Coupled Plasma-Mass Spectrometry on the Detection of Trace Metals Lead in Sea Water

详细研究了以大孔硅胶为基质,一步合成8羟-基喹啉(8-HQ)型金属螯合色谱填料的方法,采用正交试验对合成方法进行了优化。与传统合成方法所得的填料进行了比较,从理化指标等方面来看,新的合成方法为佳。将该法用作微柱流动注射(FIA)在线分离、富集和电感耦合等离子体质谱(ICP-MS)分析流程中的固定相,对大洋海水中的痕量铅进行了在线分析,得到了较满意的结果。A new method for the synthesis of 8-hydroxyquinoline(8-HQ) bonded silica(SHQ) for metal chelation applications has been developed.The new synthetic route has been compared with the conventional one reported in the literature in terms of reaction yield,product performance and operational ease.The new method is based on a one-step Mannich reaction,and an orthogonal experimental design has been used for process optimization.The 8-HQ bonded silica product obtained has been characterized by diffuse reflectance infrared Fourier transform(DRIFT) spectroscopy,and the presence of a strong absorption band of the phenol-OH near 1380 cm~(-1) indicates the successful bonding of 8-HQ on silica surface.The concentration of 8-HQ bonded to the silica surface quantified by ultroaviolet-visible spectroscopy is 542 μmol/g,much higher than the product obtained by the conventional synthetic route,which is 117 μmol/g.The dynamic binding capacities of the two SHQs towards copper(Ⅱ) has been measured and compared by inductively coupled plasma mass spectrometry(ICP-MS),and the results are 347 μmol/g for the new SHQ and 76 μmol/g for the(conventional) one.The results demonstrate that the new method is not only simpler and more convenient operationally,but also produced product with better performance.The SHQ synthesized has been used for(measuring) trace lead in(seawater) and estuary water samples using on-line flow injection(FIA)-ICP-MS.The(detection) limit of the method is about 10 ng/L,and the relative standard deviation(s_r) is 9.1%.Using CASS-4 standard seawater samples spiked with Pb standard,the recovery of Pb from the process is about 140%.The high recovery observed is likely due to the contamination of Pb in the high purity nitric cid used in the experiments.国家863计划(No.20034A635180);; 青岛科技将才计划基金项目(No.04-3-J.J-11