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。     

1.5米光栅直读光谱仪的试制

光电直读发射光谱分析,具有快速、准确、同时能进行多元素分析等优点,此方法已普遍地用在金属与合垒的分析上。光电直读光谱仪工作原理为:一个入射狭缝,让分析样品所激发的光通过,照射到色散元件上,经分光后,被聚焦在焦面上,形成光谱,在焦面上置有若干出射狭缝,将待测元素的特定波长引出,投射到光电倍增管上,使光能变为电能,然后由电子学测量系统逐一地进行测定。这样光电直读光谱仪的入射狭缝,光栅和出射狭缝之间     

聚光科技推出高分辨率电弧全谱直读光谱仪

<正>聚光科技正式对外发布直读光谱仪家族的最新成员:E5000A型高分辨率电弧直读光谱仪,与E5000共用同一技术平台,把原有2 400 L/mm的光栅更换为3 600 L/mm,增大光谱仪色散,分辨率提高了30%,光谱半高全宽达到18pm。在样品分析过程中,能有效的避免元素间干扰,使     

光电直读发射光谱法分析铝及铝合金的标准之间的差异

正光电直读发射光谱法因具有操作简单、多元素同时分析、分析速率快、准确度高、重现性好、不易受到污染、干扰小和成本低等[1-2]优点,广泛应用于铝及铝合金化学成分分析中。光电直读发射光谱法尤其迎合企业生产过程中炉前、炉后快速化学成分分析和调整的生产需要,光电直读发射光谱仪已经成为铝制造企业不可或缺的检测设备之一。光电直读发射光谱法基本原理是样品被火花光源激发,经入射狭缝到达光栅上色散成光谱,作用在光电倍增管或电荷耦合元件(CCD)检测器上产生光电流(即光能转变为电能)。通过检测系统、计算机数模转换,     

ARL-3460型直读光谱仪常见异常现象的处理

直读光谱仪分析钢铁样品是现代钢铁企业分析的常用方法之一。随着科学技术的不断发展，直读光谱仪的价格已不再是高不可攀，其在生产实践中所表现出的快速、准确、精度高等特点，是其它化学分析方法无法替代的，它的普及推广给传统的冶金分析带来了一次革命。但是直读光谱仪毕竟包含了比较复杂的系统，在实际使用中难免会出现一些问题，为了便于使用者处理运行中所出现的异常现象，     

电子计算机控制的光电直读光谱仪

电子计算机控制的光电直读光谱仪具有快速、准确、操作简便、同时进行多元素分析等优点。这种仪器在国外已广泛地用于金属合金等样品的快速分析。在国内由于某些关键问题未得到解决,因此还没有研制成这种类型的仪器。1977年末我们开始研制小型电子计算机控制的光电直读光谱仪。所用电子计算机为吉林大学与应化所于1975年试制成的JY-1型电子计算机。整个工作包括光电光谱仪、测光电子柜、接口设计制造、程序设计及分析方法。在联机试制过程中解决了一些技术上的关键问题,于1981年5月在国内首次实现了电子计算机控制的光电直读光谱仪的自动操作,并进行了数种实际样品分析,现将各部分叙述如下。     

牛津仪器新型直读光谱仪面世

英国牛津仪器公司工业分析部最近宣布一款新型直读光谱仪FOUNDRY-MASTER PRO诞生。因采用先进的CCD技术以及延伸了可检测的波长范围(低至130μm),FOUNDRY-MASTER PRO的卓越性能使之成为实验室用直读光谱金属分析仪的典范。FOUNDRY-MATER PRO的所有部件设计可靠,作为一款非常成熟的实验室用光谱仪,它是金属制造厂、加工厂及铸造行业首选的设备。友好的用户软件和众多利于客户使用的特点保证了仪器操作简便。紧凑、坚固和可靠的设计特点,使高精准的FOUNDRY-MASTER PRO可在任何场合使用,并将用户的维护成本降至最低。FOUNDRY-MATER PRO能够适应各种工作环境,有助于用户更好地在生产加工过程中的各个关节对金属材料进行分析,最大限度地提高生产效率。(中国化工仪器网)牛津仪器新型直读光谱仪面世     

影响火花放电原子发射光谱法测定铝锭中杂质元素准确性的研究

采用火花放电原子放射光谱法测定内蒙古准格尔煤田高铝粉煤灰中提取的铝锭中的Si、Fe、Cu、Mg、Mn、Zn、Ga、Ti、Ni、Cr、V、Al等杂质元素含量,考察了样品制备、分析过程、仪器附件等三个方面对直读光谱仪检测准确性的影响。结果表明,样品平整度及温度、类型标准化及测样位置以及氩气和电极都会对测试准确性产生较大影响,得出直读光谱仪的最佳测试条件为：样品表面光滑、平整,温度为20 ℃~30 ℃;电极清理频率为1次/样品,且电极极间距为3 mm;氩气纯度≥99.999 %、氩气输出压力为0.25~0.3 MPa。在最佳测试条件下,火花放电原子放射光谱法的测试准确性可满足实际生产需要。     

岛津台式光电直读光谱仪PDA-MF北大核心CSCD

2017年4月岛津公司首次推出台式光电直读光谱仪PDA-MF系列。该系列新品特别为东南亚等新兴市场应用所设计,能够快速分析固体金属样品中的元素。     

交流电弧直读光谱法快速测定地球化学样品中的银、锡、硼、钼、铅

采用国内首创的交流电弧直读光谱仪,以交流电弧为激发光源、凹面光栅分光、光电倍增管接收、智能测控系统快速数据采集及处理,可取代传统1米或2米光栅摄谱仪的相板记录方式及洗相、译谱等繁琐的操作程序。在优化的实验条件下,对粉末状地球化学样品中的银、锡、硼、钼、铅,进行交流电弧直读光谱法测定,检出限分别为0.012,0.24,1.65,0.20,1.30μg/g,精密度和准确度均可满足行业规范的要求,其测定值与ICP-MS和ICP-AES的分析结果相符。     

Direct-reading d.c. arc spectrometry for rapid geochemical surveys

A technique developed for the rapid quantitative analyses of metals in large suites of silicate materials is described. A direct-reading emission spectrometer interfaced to a dedicated minicomputer is used with d.c. arc excitation. Sample, buffer and arc parameters were chosen to promote reproducible selective volatilization. By partial integration of the line emission for the volatile metals, the spectrum background contribution is reduced, improving line to background ratios and permitting both “volatile” and “nonvolatile” metals to be determined in one burn.Preformed electrode cups are used in a specially designed arc chamber which incorporates a gas jet for controlled atmosphere and arc stabilization, and permits automatic electrode alignment as well as rapid and efficient cleaning between samples. No adjustment of the electrodes is made during the burn.One standard only is required for calibration since the working curves are linear over the concentration ranges of interest and a method of background correction using this same standard is described.A high rate of analysis as well as good accuracy and precision is achieved for 21 metals.     

CCD-1型平面光栅电弧直读发射光谱仪测定化探样品中铅锡钼铜银锌的方法研究

2017年三月我单位购进湖北地质中心实验室王鹤龄研发专利技术,将原来WP-1米平面光栅摄谱仪改造为CCD-1型平面光栅电弧直读发射光谱仪。CCD-1型平面光栅电弧直读发射光谱仪是对WP-1米平面光栅摄谱仪改造升级后,成为一款高性能全谱直读光谱仪。我们在原有CCD-1平面光栅电弧直读发射光谱仪测定硼锡银钼基础上,通过多次方法实验,研究出一次摄谱同时测定铅锡钼铜银锌六项元素的分析方法。六个元素测定的检出限Pb 1.56 Sn 0.42 Mo0.21 Cu 0.87Ag 0.012 Zn 7.95(RSD﹪ n=12)1.25﹪~7.43﹪,测定结果经验证准确度精密度检出限和合格率各项指标满足地质矿产实验室管理规范的要求。     

Comparison of the evaporation processes of classical spectrography and optical spectrometry tandem technique for the determination of the relevant environmental elements

The evaporation as a part of the spectrochemical excitation process is a complicated procedure during which different thermo-chemical reactions connected mainly to the formation of carbides are overshot. This one is accelerated namely at the 4000 K on the top of the carrier electrode. The carbide creation markedly affects the evaporation process of single elements of the given matrix and modifies this process. In spite of this it is evident that the intensity of the DC arc has a significant impact on the evaporation of all elements. The evaporation capability of two optical methods, the classical non-controlled direct current (DC) arc spectrography and the PC controlled DC arc optical emission spectrometry, have been compared for the determination of some environmental important elements (Al, Cr, Ni, and V). The experiments were carried out using grating spectrograph PGS-2 and simultaneous multi-channel LECO 750 spectrometer which is connected to a separated evaporation cell and adjusted to the Marinković plasma source. Standardized evaporation curves were designed and the half-time (t_50%) values and the total (t_100%) evaporation time values were calculated. The basic statistical evaluation was done and the main figures of the merit were calculated.     

便携式远程激光诱导击穿光谱系统及其定量分析性能

因高温、辐射等极端环境限制，核领域亟需具备在线快速检测特性的分析仪器。基于小型风冷脉冲激光器与小型光纤光谱仪实现了远程激光诱导击穿光谱技术（LIBS）装置的小型化，对该便携式远程LIBS系统的定量分析性能进行了研究，实现了5 m外样品的元素遥测。在单脉冲激光能量100 mJ，脉冲延时1.0 μs的分析条件下，实现了白水晶、陶瓷及铝合金样品中Mn、Si、Al、Na、Ba、Ca及Cr元素的激发，验证了LIBS技术对材料组分和物料成分的远程探测能力，对铝合金样品的定量分析结果显示，该远程遥测系统对铝合金样品定量测量结果的最大相对平均偏差为12%，具备执行核领域快速分析场景下的半定量检测能力。     

Geoanalysis using plasma spectrochemistry – milestones and future prospects

Highlights of plasma spectrochemistry in geoanalysis are reviewed. The techniques are evaluated in terms of recent instrumental developments, calibration strategies, spectral and matrix interferences and analytical performance. While acid decomposition results in solutions containing low salt contents, this decomposition strategy is inappropriate for numerous sample types due to poor recoveries. On the other hand, alkali fusions result in total decomposition, but solutions containing high salt contents constrain the accuracy due to interference effects in the inductively coupled plasma (ICP), the sample introduction system, and in the quadrupole mass spectrometer interface. Therefore, practical limits of determination are evaluated in terms of salt tolerances. It is concluded that ICP-atomic emission spectrometry (AES) is employed mainly for the accurate determination of the major and minor elements and the more abundant trace elements. On the other hand, ICP-mass spectrometry (MS) is used mainly for the determination of trace elements and together with the possibility of obtaining some isotopic information, it profoundly enhances the capability for solving geochemical problems. Several methods of direct solid sample introduction are described. These include direct current (DC) arc emission spectroscopy (DC-AES), slurry nebulization (SN), spark ablation (SA), laser ablation (LA) and glow discharges (GD). These devices allow direct solid analysis of bulk samples, single minerals and inclusions.     

光电直读光谱法测定高锰不锈钢中硫量的改进

使用Spectro Lab M8光电直读光谱仪所提供的Fe-30不锈钢分析程序测定高锰不锈钢中硫量时,所得测定值均偏低。为此,改用高锰不锈钢国家光谱标准样品和内控样品,重新确定了干扰元素(特别是锰)的基体校正模式及测定硫元素的回归分析曲线。通过7个不同含锰量的不锈钢标准样品的分析验证,证明采用经过改进的方法所得测定值均与认定值一致,其绝对误差值均小于JIS标准的允许差。     

Über die Herstellung computergezeichneter Spektrenkarten

A method is described which allows to draw spectral cards by a computer controlled plotter for grating or prism spectrographs and for the enlargement of the available spectrum projector. Spectra of any spectral character (arc, spark, hollow cathode, etc.) can be approached. The plotted spectra are strongly simplified but yet very similar to real spectra. An exact fit can be achieved.     

儿童复发性口腔溃疡血清微量元素的分析

目的探讨了儿童复发性口腔溃疡血清微量元素的变化。方法分别收集实验组和对照组静脉血清样品各50例,应用等离子体发射光谱仪测定Zn、Cu、Fe、Mg含量。结果儿童血清微量元素含量测定,实验组Zn含量明显低于对照组（P〈0.05）,Cu、Fe、Mg含量与对照组比无显著性差异（P〉0.05）。结论儿童复发性口腔溃疡的发生与体内缺Zn有关,值得进一步探讨。     

The analysis of geological samples for trace elements by direct-reading emission spectrometry

The experimental work is described that led to the development of a rapid and convenient method for the determination of a number of trace elements in geological samples by use of a direct-reading spectrometer. The technique involves the diluting of a sample in the ratio of 1 part of sample to 3 parts of a buffer consisting of graphite containing 20% lithium fluoride and 0.03% germanium oxide as a reference element. The mixture is loaded into a special electrode and is excited in a d.c. arc at 12 A for 80 ± 2 seconds. The excitation takes place in an inert atmosphere that is provided by a “double flow” gas-stabilizing jet. The resulting digital-voltmeter readings for the various elements are read against previously prepared calibration graphs, and the concentrations of the elements in the sample are derived. The elements determined in the direct-reader programme are Co, Cr, Cu, Mn, Mo, Ni, Pb, Sn, V, Zn and Zr. A photographic spectrographic variant of the method, developed at the same time, is also described. It permits the determination of a number of trace elements not in the direct-reader programme. The relative standard deviation for the method is 10–15%, and the accuracy is of the same order.