QSN750直读光谱仪异常现象的处理

介绍了德国OBLF公司生产的QSN750型光电直读光谱仪的几种常见异常故障现象,分析了这些异常现象的产生原因,提出了多年来一些经验上的处理方法,较好地解决了因直读光谱仪故障而出现的问题.     

3080E3型X射线荧光光谱仪故障排除方法

介绍了3080E3型X荧光光谱仪几例故障及排除方法。     

光谱仪测试范围的扩展

由于石化行业的生产需要，其材质的使用具有多样性和广泛性，经常会出现顾客委托的测试样品的一个或几个元素跨越光谱仪现有测试程序测量范围的情况。本法通过对光谱仪测试原理的认识，根据光谱仪的测试能力及标样的采集，实现了一个或几个元素测量范围的扩展，并对其测量的影响因素进行了研究。     

光谱实验室的建设和管理

阐述冶金、铸造等行业用于金属成分分析的直读发射光谱仪实验室的建设和管理。从仪器的调研、选型，实验室选址，基础设施设备的准备，仪器的安装、调试、验收、日常分析，实验室管理等几个方面，分别作了介绍。     

Foundrymate真空型光谱仪在铸造不锈钢炉前分析中的应用

ＢａｒｉｄＦｏｕｎｄｒｙｍａｔｅ台式火花直读光谱仪采用了全新的电子系统,提高了分析精密度。在频快速不锈钢的炉前分析中,Ｆｏｕｎｄｒｙｍａｔｅ光谱仪对铸不锈钢中多元素的同时测定快速、准确、克服了化学分析方法存在的问题。并就影响Ｆｏｕｎｄｒｙｍａｔｅ光谱仪对样品分析的准确度与精密度的主要因素进行了分析讨论。     

自改造金属直读光电光谱仪的应用

DV-6SN金属直读光电光谱仪经过十几年运转,在硬件上出现老化问题,设备故障率不断,配件短缺,不能正常使用,软件不能适应检测数据信息化的要求。光谱仪经过软件、硬件的改造,在确保仪器分析精度不降低的前提下,通过改造升级旧光谱仪器的计算机控制系统、数据采集系统等;真空泵,部分有问题配件国产化改造,并配备新开发的光谱分析专用软件,能实现金属直读光谱仪正常运行,提高检测准确度,提高工作效率,旧光谱仪器获得新生,实现仪器的全面信息化数字化管理。     

金属光电光谱仪软件、硬件改造

DV-6SN金属直读光电光谱仪经过十几年运转, 在硬件上出现老化问题,设备故障率不断,配件短缺,不能正常使用,软件不能适应检测数据信息化的要求。光谱仪经过软件、硬件的改造,在确保仪器分析精度不降低的前提下,通过改造升级旧光谱仪器的计算机控制系统、数据采集系统等,真空泵,部分有问题配件国产化改造,并配备新开发的光谱分析专用软件,能实现金属直读光谱仪正常运行,提高检测准确度,提高工作效率,旧光谱仪器获得新生,实现仪器的全面信息化数字化管理。     

ZSX Primus Ⅱ型X射线荧光光谱仪故障处理与维护

介绍了日本理学ZSX Primus Ⅱ型X射线荧光光谱仪使用中所出现的几例故障现象,对其产生的原因进行了分析,归纳总结了故障排除的方法与过程。     

端视等离子体原子发射光谱仪的性能评价

端视等离子体原子发射光谱仪与侧视等离子体原子发射光谱仪相比在分析性能方面所表现出来的差异一直是光谱分析工作者所关注的一个重要方面。此文较系统的总结了近年来在此方面所做的研究工作，引用47篇文献。     

2018年全球分子光谱市场规模将达59亿美元

<正>不久前,市场研究机构Markets and Markets发布了"全球分子光谱2013～2018年市场预测"的报告。据报告,2013年全球分子光谱的市场规模为43亿美元,预计2018年该市场规模将达到59亿美元,年均复合增长率预计为6.7%。该报告涵盖的分子光谱产品包括核磁共振波谱仪(NMR)、紫外–可见光谱仪(UV–VIS)、红外光谱仪(IR)、近红外光谱仪     

原子发射光谱仪器研究新进展

原子发射光谱仪器正不断向光电化、自动化、高灵敏度、高分辨率、小型化、便携式、低分析成本等方向发展。介绍了原子发射光谱仪的激发光源、色散系统和检测系统的进展。可供广大仪器分析和分析仪器领域的科技工作者参考。     

原子吸收光谱仪石墨炉电源的故障分析与维修

在对原子吸收光谱仪石墨炉电源电路板测绘的基础上,分析了该电源主电路的故障原因,并给出了维修过程。     

原子荧光法测定水中总锑含量的不确定度评定

根据原子荧光光度法,用AFS-9700双道原子荧光光度计测定水样中的总锑含量,并且分析了主要的测量不确定度来源,即标准溶液引入的不确定度、建立工作曲线引入的不确定度、回收率引入的不确定度和重复测量样品引入的不确定度,对测量不确定度进行计算和评定,合成测得总锑含量的不确定度为0.10?g/L。     

ICP-OES法与石墨炉原子吸收法测定饮用水中重金属元素比较

通过对比电感耦合等离子体发射光谱法(ICP-OES)与石墨炉原子吸收法(AAS)测定水中重金属的检出限、重复性、加标回收率等实验,验证两种方法的准确性,从而为饮用水中重金属的测定提供可靠的方法。结果表明,石墨炉原子吸收法测定饮用水中砷、镉、铬、铅、汞、硒检出限均低于ICP-OES法,但ICP-OES法测定线性范围宽,重复性和加标回收率均优于石墨炉原子吸收法,分析速度快,操作便捷,结果满意,是目前饮用水中重金属的测定非常可靠的方法。     

The Removal of Zn(II) Through Calix[4]Recorcinarene Derivative Based Polymer Inclusion Membrane From Aqueous Solution

In the present work, the transport of Zn(II) metal ion from an aqueous nitrate solution of different metal ions through a polymer inclusion membrane (PIM) containing calix[4]resorcinarene derivative used as a carrier were investigated. Zn(II)metal ion showing high permeability were transported through PIMs prepared from cellulose triacetate (CTA) as a polymeric support material and 2-NPOE as a plasticizer. Total Zn(II) concentration was determined with an Atomic Absorption Spectrometer (AAS) in the acceptor phase. The prepared PIM and supported liquid membrane (SLM) were characterized by using Scanning Electron Microscopy(SEM) and Atomic Force Microscopy (AFM) techniques. The effects of membrane composition, effects of type of plasticizer in the membrane, effects of carrier concentration, and the thickness of the membranes were examined in the facilitated transport experiments of Zn(II) ion through PIM. We compared the performance of SLM experiments under the optimum conditions identified by the PIM studies. Higher permeability coefficient values for Zn(II) was found for SLM, while lower values were ascertained for PIM. The kinetic parameters which have been calculated as the constant rate (k), permeability coefficient (P), flux (J) and diffusion coefficient (D).     

Os and Pd Modified Tin Oxide Films for Sensors by the Sol Gel Process

Pure, Pd and Os modified SnO₂ films were prepared by the sol gel process and used as active materials in gas sensing devices. The films have been prepared starting from tin tetrachloride in alcoholic solution hydrolysed with water. The modifier was added to the sol as inorganic salt. Pd acetate and Os chloride were the Pd and Os precursors respectively. A structural and morphological study was carried out by means of Atomic Force Microscope (AFM), Secondary Ion Mass Spectrometer (SIMS) and x-ray Diffraction (XRD). The electrical resistance variations as a function of various gaseous atmospheres and temperature were measured to evaluate the sensing properties of the films. CO, CH₄, CH₃OH and C₂H₅OH gases were used for the tests. Following results were obtained: Pd is present in the form of PdO nanoclusters in the polycrystalline SnO₂ matrix as evidenced by XRD spectra whereas Os is a cationic modifier uniformly dispersed as evidenced in SIMS studies. Optimum sensing temperature and the sensitivity variations, with respect to the undoped films, differ according to the gaseous species. It looks therefore promising to use inexpensive, sol-gel derived, array of films in smart gas sensing devices that are able to recognise gas species and concentration.     

Trends in surface and interface analysis

Summary The rapid progress in high technology constantly poses new challenges for Analytical Chemistry and prompts the development of new techniques and procedures. The influence is particularly strong in surface and interface analysis, which is developing at a rapid pace. This paper discusses some of the frontier areas like high-resolution depth-distribution analysis of trace elements, quantitative depth distribution analysis of ultra thin-layer systems, quantitative trace element analysis in monolayers, 3-dimensional stereometric analysis, molecular analysis, in-situ atomic resolution analysis of surfaces (chemical nanoscopy). Methodological approaches are discussed as well as results obtained mainly with solid state mass spectrometry and atomic force microscopy.Abbreviations and acronyms AES Auger Electron Spectrometry - AEM Analytical Electron Microscopy - AFM Atomic Force Microscopy - BSE Back Scattered Electrons - EPMA Electron Probe Micro Analysis - LRI-SNMS Laser Resonance Ionization Sputtered Neutrals Mass Spectrometry - SE Secondary Electrons - SEM Scanning Electron Microscopy - SIMS Secondary Ion Mass Spectrometry - STM Scanning Tunneling Microscopy - TEM Transmission Electron Microscopy - TOF-MS Time-of-Flight Mass Spectrometer - TXRF Total Reflection X-Ray Spectrometry - XPS X-Ray Photoelectron Spectroscopy Dedicated to Professor Dr. Wilhelm Fresenius on the occasion of his 80th birthday     

Analysis of Pesticides in Water Samples Using GC-ECD and GC-MS/MS Techniques

Abstract

A pesticide multiresidue method for determining dichlorvos, naled. lindane, diazinon. chlorpyri-fos-methyl, dichlofluanid, chlorpyrifos, folpet, α– and β-endosulfan, endosulfan-sulphate, fen-propathrin and acrinathrin in water samples at the levels required by the EEC Drinking Waters Directive has been developed. The pesticides were selected among the most used during die last 20 years in Almeria (Spain), where there is a high agricultural activity. Solid Phase Extraction (SPE) was selected as extraction method after being compared with Liquid-Liquid Extraction (LLE). Moreover, different gas chromatographic detectors (Electron Capture Detector, ECD; Mass Spectrometer, MS; Tandem Mass Spectrometer, MS/MS) were compared. The best results of repeatability and sensitivity were obtained for ECD and MS/MS.     

FTS-20E富里叶红外光谱仪数据系统改造

报道了ＦＴＳ－２０Ｅ富里叶红外光谱仪数据系统改造的工作，采用ＩＢＭ４８６计算机及新的数据接口取代了陈旧的ＮＯＶＡ４数据系统。文章详细描述了其硬件设计和软件编辑。改造不仅更新了ＦＴＳ－２０Ｅ富里叶红外光谱仪，而且还使其达到９０年代的水平。     

FTS-20E富里叶红外光谱仪数据系统改造

报道了ＦＴＳ－２０Ｆ富里叶红外光谱仪数据系统改造的工作采用ＩＢＭ４８６计算机及新的数据接口取代了陈旧的ＮＯＶＡ４数据系统，文章详细描述了其硬件设计和软件编辑，改造不仅更新了ＦＴＳ－２０Ｅ里叶红外光谱仪，而且还使其达到９０年代的水平。