智能嗅觉的发展和挑战

智能嗅觉的发展和挑战杨原，王小如，李权龙，杨成隆，王志勇，袁东星（厦门大学化学系近代分析化学研究所，361005）智能嗅觉的发展经历了缓慢的，曲折的成长过程。就其原因来看，一方面是由于嗅觉传感器的发展速度远远落后于视觉传感器的发展￣［1］，另一方面是..

FI On-line Membrane Separation/Preconcentration and Its Application in Atomic Spectrometry

研究了IdAE（IMInOdIACETICACId/ETHylCElulOSE）膜的在线分离预富集环境水样品中痕量元素的流动注射分析系统。建立了将在线流动注射这一体系与火焰原子吸收、电感耦合等离子体原子发射光谱联用，通过计算机辅助采集数据点，实现天然水样品中痕量重金属元素Cd，CO，Cu，Pb，Mn，V，nI等的在线分离预富集的原子光谱分析方法。本方法的测定速率达到30次/H，浓集倍数达20倍。同时我们还考察了体系的检出限、相对标准偏差、加标回收率、膜的动态容量和动态富集性能、富集效率、使用寿命等，取得了令人满意的结果。实验结果表明，流动注射分析（fIA）在线分离预富集比起微型柱分离来说，有许多优点，如：分析速度快、自动化程度高、操作简便、不易堵塞、寿命长、重现性好、样品的消耗量少等。IdAEC膜分离预富集与fIA-ICP-AES联用的体系，是一种极为方便，高效而且普遍适用，易于推广的测定环境水样品中痕量重金属元素的手段。The iminodiacetic acid/ethyl cellulose(IDAEC) membrane was applied to the FI on-line separation and preconcentration For the trace elements in environmental waters.The system was copied with both AAS and ICP-AES.The optimization of the system was perFormed.The preconcentration Factor of 20 could be reached.The asmple up-take rate is 30 per hour.The system developed in this work has the advantages of Fast analysis, automatic operation, less asmple consumption.国家自然科学基

The Hyphenated Technique of Thermal Spray Nebulization and ICP-AES

热喷雾器（简称TSP）是近些年来出现的一种新的雾化系统，它的雾化效率相对常规同心气动雾化器（简称Pn）有了比较大的提高，而且还可以在溶液雾化的同时将样品电离，适用于ICP-AES、ICP-MS等检测器。设计并建立了热喷雾装置，连接去溶装置，对TSP-ICP-AES体系的实验参数及其性能作了初步的分析，并与气动雾化器的性能作了比较，发现热喷雾器的各项性能均有了不同程度的改善。The development and application of the thermal spray nebulization(TSP) has been paid a lot of attention.Compared with pneumatic nebulization system, its nebulization eFFciency is greatly improved.A new system of TSP is established in the present work, combined with dissolvation system, the perFormance was Further improved.国家自然科学基

Determination of Ultra-trace Amounts of Heavy Metals of Antarctic Snow and Ice

本文全面阐述了南极冰雪样品中重金属分析测定的发展概况和极地样品分析中出现的困难，评述了各种分析方法（包括富集技术、超灵敏的分析技术）的优缺点，并指出其发展方向。引用文献47篇。This paper reviews the advance in analysis of ultra-trace amownts of heavy metals of Antarctic snow and ice.It also describes the development of analysis,the advantages and disadvantaged of all kinds of the analytical methods (including enrichment technmiques and ultrasensitive analytiscl techniques) and the trends in the study.47 reFerences are given

Thermospray Nebulization as Sample Introduction For Inductively Coupled Plasma Atomic Emission Spectrometry

设计并建立了热喷雾器及其去溶装置.用热喷雾作为电感耦合等离子体原子发射光谱的进样技术，并对其性能作了系统研究.与气动雾化器比较，对23个元素检出限的改善为5~20倍.A sample introduction system, thermospray nebulizer was coupled to an induc-tively coupled plasma atomic emission spectrometer.The optimization procedure includes theICP operation conditi0ns, the capillary temperature, the sample uptake rate, aeroso1 spraychamber temperature and the cooling water temperature.Under optimized c0nditions, thesensitivity For 23 elements obtained with the thermospray system is 14--25 times higher thanwith a pneumatic nebulizer- The therm0spray systems have been shown to improve detectionlimits an 0rder 0F magnitude lower than that obtained with Pneumatic sample introduction.国家自然科学基

钯－硝酸镁基体改进剂石墨炉原子吸收光谱法测定六味地黄丸中锡

钯-硝酸镁基体改进剂石墨炉原子吸收光谱法测定六味地黄丸中锡杨成隆，庄峙厦，覃事栋，王小如，杨原（厦门大学化学系，厦门，361005）六味地黄丸是我国具有悠久历史的传统中成药，具有滋阴补肾的功能.鉴于目前国内外严格控制中成药微量重金属含量及国家有关部门..

Determination of Trace Mercury in Samples of Traditional Chinese Medicine by Cold-Atom Generation Atomic Spectrometry

本文采用自制电热恒温石英管还原气化冷原子吸收光谱法,直接测定了六味地黄丸中的痕量汞。方法检出限为0.1PPb;回收率为90—98%;相对标准偏差为4.3%。该方法简便,重现性好,准确度高,可用于中成药中痕量汞的测定。Using a homemade device of the electric heated quartz-tube atomizer, including a controlling temperature unit and a continue hydride generator, trace mercury in,samples of traditional chinese medicine (Liu Wei Di Huang Wan) has been determined directly.The method is simple, convenient, and of good precision and high accuracy.It is a very practical method For the analysis of trace mercury.The detection limit is below 0.1ppb, and the recovery is 90-98%

Palladium and Magnesium Nitrate as GFAAS Martix ModiFiers For Tin Determination in Traditional Chiness Drug

本实验建立了钯-硝酸镁基体改进剂石墨炉原子吸收光谱法测定六味地黄丸中锡的方法。研究了基体改进剂的加入方式对测定的影响。方法的相对标准偏差为2.5%，回收率在90%~110%之间，检出限为0.3ng/Ml。本方法可用于中成药中锡的测定。A graphite Furnace atomic absorption spectrometric method For the determination of tin in traditional Chimese drug〃 Liuwei Dihuang Wan〃is described.A mixture of palladium and magnesium nitrate is used as a matrix modiFier.A special procedure For the application of the matrix modiFier has been employed.The detection limit is 0.3ng/mL,and the relative standard deviation is 2.5%,The recovery is in the range of 90%～110%

流动注射—超声雾化器—电感耦合等离子体原子发射光谱(FI-ICP/AES)联用技术同时测定头发中多种元素

建立了 FI-UN-ICP/AES 联用技术,用所发展技术进行了头发中多种微量元素的同时测定。与常规气动雾化器 ICP/AES 技术相比,尽管是用流动注射方法引入样品,测定的检出限仍有较大改进(2—23倍)。多次注射测定的再现性(RSD)在0.6—5.0%范围内。同时进行了标准加入回收试验,获得了很好的结果(90—110%)