实验室信息管理系统中仪器设备管理模块的设计与实现

根据资质认定、实验室认可要求,从仪器设备管理的要求和仪器设备管理工作实际出发,归纳了实验室仪器设备管理、计量溯源方面的要求以及管理环节中容易出现的问题,采用用户界面(user interface,UI)插件技术和Gojs技术开发了信息管理系统仪器设备管理模块,降低了系统维护的难度,满足了系统使用的个性化需求,实现了仪器...     

基于SPECS生产的分子束外延设备样品加热平台的改进

改进了分子束外延设备样品加热平台的加热和测温方式,在原有热辐射加热和红外测温的基础上,增加直流电流加热并采用比例积分微分(PID)精密控温装置对样品加热台进行测温和控温.改进后,原有设备所能制备的研究样品范围更广,并且还增加了围绕设备所展开的科研方向,扩充了设备的使用范围.     

High resolution scanning of DNA autoradiographs.

The sizes of DNA fragments (alleles) on autoradiographs are measured by means of a computerised video scanner developed in this laboratory. This report investigates the advantages of using higher resolution equipment for this purpose. High resolution is simulated by using existing equipment and moving the video camera closer to the autoradiograph. Test autoradiographs, used to validate the original scanner, have been rescanned to determine the degree of improvement that could be obtained using expensive high resolution equipment.     

Food processors requirements met by radiation processing

Processing food using irradiation provides significant advantages to food producers by destroying harmful pathogens and extending shelf life without any detectable physical or chemical changes. It is expected that through increased public education, food irradiation will emerge as a viable commercial industry. Food production in most countries involves state of the art manufacturing, packaging, labeling, and shipping techniques that provides maximum efficiency and profit. In the United States, food sales are extremely competitive and profit margins small. Most food producers have heavily invested in equipment and are hesitant to modify their equipment. Meat and poultry producers in particular utilize sophisticated production machinery that processes enormous volumes of product on a continuous basis. It is incumbent on the food irradiation equipment suppliers to develop equipment that can easily merge with existing processes without requiring major changes to either the final food product or the process utilized to produce that product. Before a food producer can include irradiation as part of their food production process, they must be certain the available equipment meets their needs. This paper will examine several major requirements of food processors that will most likely have to be provided by the supplier of the irradiation equipment.     

理化分析测试实验室仪器设备的管理

仪器设备是实验室的重要资产,仪器设备管理是实验室正常运行的重要组成部分。从仪器设备的管理架构以及仪器设备的采购、验收、量值溯源、维护维修、报废等方面讨论了理化分析测试实验室仪器设备管理工作的重点和注意事项。     

Fast determination of calcium oxide in bauxite

An equipment and procedure were developed to determine the CaO content of bauxite by X-ray fluorescence method using scintillation techniques and a tritium/Ti exciting source. The time needed for the whole sample preparation procedure and measurement is less than 10 min. The range of concentration where analysis is feasible by the equipment, is from 0.3% upwards.     

Mössbauer and X-ray analysis of corrosion products from surface equipment of oil production well

Wellhead equipment corrosion samples including internal surface of choke were analyzed by means of Mössbauer spectroscopy and X-ray diffractometry. The samples include some impurities of quartz, dolomite and calcite. The resulted analysis shows some iron oxides and oxyhydroxides as surface equipment corrosion products.     

食品检测实验室大型检测设备的管理探讨

从食品实验室大型设备定义、仪器设备购置、使用管理、人员管理、共享管理、网络化管理、设备报废7个方面对食品检测实验室大型检测设备的管理进行了探讨,尤其是对量值传递/溯源、仪器使用人员管理提出了建议.     

水体总毒性在线检测仪器的研制

研制了基于电化学媒介体法的水体总毒性在线检测仪器, 通过对比水样和标样中微生物的呼吸活性差异, 实现对水体总毒性的在线监测.毒性检测的受试体微生物为原位培养微生物.电化学检测采用三电极系统, 其中铂微阵列电极、Ag/AgCl(3 mol/L KCl)电极和金丝电极分别作为工作电极、参比电极和对电极.对浓度为5.0、10.0和20.0 mg/L的模型毒物3,5-二氯苯酚(DCP)进行检测, 获得的微生物呼吸活性抑制率分别为24.4%、48.9%和59.2%.在连续在线监测过程中, 仪器能够对所有随机加入毒性物质(5.0 mg/L DCP)的水样输出毒性警报(以10%的呼吸抑制率为毒性报警临界值), 表明此仪器可以用于水体总毒性在线检测和预警.     

Analysis of mixing efficiency in polymer processing equipment

Flow patterns In various processing equipment were obtained based on 3D isothermal flow simulations. These flow patterns were further processed for mixing efficiency analysis. The dynamics of the mixing process was studied numerically by means of tracers and their trajectories In the processing equipment. Dispersive mixing efficiency was studied in terms of shear stresses and elongational flow components distributions. Distributive mixing efficiency was characterized using length stretch distributions and average values. Features of chaotic flow were also analyzed. The framework developed to analyze mixing efficiency opens the way for an unambiguous evaluation of equipment performance and for process optimization.     

A micro-computer system for potentiometric stripping analysis

In potentiometric stripping analysis, trace metals are first amalgamated into a mercury film electrode and then oxidized back into solution by an oxidant. The potential vs. time curve is recorded. Microcomputer-controlled equipment for automation of the potentiometric stripping analysis is described. The higher resolution of time compared to manual equipment increases the sensitivity of the method. A resident, 3-kB BASIC interpreter with routines for handling the hardware makes the programming simple and the instrumentation flexible for changes in the analytical scheme. Printer and keyboard are incorporated in the equipment which makes the whole analyser compact.     

Application of thermal analysis in screening for chemical process hazards

The testing of substances and reaction mixtures for the prevention of process hazards poses special problems, which may be solved, to some extent, by commercial DTA and DSC equipment. The standard equipment specially designed for dynamic, isothermal and constant volume tests and the testing procedure is described. Finally, the principle of an evaluation method is briefly outlined.     

Conflict minerals (3TG): Mining production,applications and recycling

The growing public awareness of conflict minerals used in consumer electronics and various other devices (e.g. GPS in vehicles, medical equipment, airplane equipment and instruments, etc.) is accompanied by increasing regulatory obligations for companies affected by different laws and certification standards e.g. Dodd Frank Act section 1502, the ICGLR Regional Certification, the OECD Due Diligence Guidance or the planned EU Certification regulation.The so called conflicts minerals are natural mineral resources such as tin, tantalum, tungsten and Gold (3TG) that are critical resources for the electronic and automotive industries but also for other industries (aviation, medical equipment, etc.).Extraction of the 3TGs is widespread and includes primary industrial mining and artisanal mining as well as recycling.     

理化试验室仪器设备的计量管理

仪器设备计量管理的主要内容是通过不确定度、M_(cp)值计算或重复性试验判断仪器设备配备的合理性,开展仪器设备的计量检定、校验和检验,建立标志和技术档案等管理,使仪器设备始终处于正常的工作状态。     

Equipment qualification and its application to conductivity measuring systems

It is only possible to obtain analytical results that are suitable for their intended purpose if the equipment used is capable of producing measurements of the required quality. To ensure that this requirement is met, analysts should define the performance criteria required from the instruments, ensure that only suitable instruments are selected for analytical measurements, and confirm that these instruments continue to meet these criteria for their entire operational life. This process should be conducted on a formal, documented basis, known as equipment qualification. In addition to describing the key elements of equipment qualification for all analytical instruments, this paper gives specific guidance on its application to conductivity systems that has never previously appeared in the literature. The benefits of performing equipment qualification are highlighted and guidance is given on the selection of control standards and why the equipment vendor performing stages of equipment qualification can be of benefit to the user. The relationship between equipment qualification and method validation is discussed, including how these activities play a major role in determining the quality control measures that should be applied to routine analysis.     

The elimination of the getter effect in the determination of gases in metals by the vacuum fusion method

A furnace for determinations of gases in metals is described in detail. The essential part of the equipment is the stopper, which acts as a non-gettering baffle as well as a splash shield. The stopper is constructed of two conical halves of graphite; the movement follows by means of a rotatable shaft, passing through the tube and sealed by rubber o-rings. The entire analytical equipment is outlined, and some results of analysis with and without the stopper are given.     

中学化学实验室气体环境的实测研究

对中学化学学生实验活动中产生的气体污染物进行测试,得到不同通风条件下化学实验室内部空气污染物的数据。结果表明,中学化学学生分组实验产生的主要气体污染物有苯、甲苯、甲醛、氨气等,实验过程中如不采取任何通风措施,实验室气体污染物的浓度短时间内会急剧升高,所以采取有效措施对实验室内部空气污染物进行消除是非常必要的。目前中学化学实验室配备的通风设备以桌面排风设备为主,相比于自然通风的环境,学生实验时开启桌面排风设备,能够有效降低实验产生的气体污染物浓度。     

Cleaning validation using thermogravimetry

The health authorities require that equipment used in the pharmaceutical industry is clean prior to use. The main raison is to prevent any contamination of the drug products. This article demonstrates that thermogravimetry (TG) can be used for the determination of the residual impurities during the cleaning validation of the equipment of pharmaceutical production plants. The accuracy and the recovery rate of this method are comparable with those of the classical analysis method (determination of the distillation residue using a rotary evaporator). The fully automation of the testing equipment even allows its utilization around the clock by plants operators, leading to a significant reduction of the time necessary for the cleaning validation and to an increase of the plant capacity.     

汽油催化裂化的全自动在线分析系统

利用实验室闲置的高压微反应装置和气相色谱仪,通过改装高压微反应装置上唯一一路自动气动控制系统,使其同时控制三路六通阀,实现高压微反应-三台色谱-三套色谱软件联动,全自动在线分析汽油催化裂解产物,不仅实现了反应-分析的同步性、多任务化和高度自动化,实验成本也大幅下降.并对六通阀原待采样模式进行了改进,大幅降低了对管道的污...     

Educational equipment in the periphery of a large computer

Two practical examples of educational equipment in the periphery of a large (or medium) computer are described. The management system for lessons with several video displays is illustrated by a flow chart, and the total load to the central processor is assessed. A demonstration equipment which combines a graphic display, a scan-converter and a projection TV, is shown to be valuable. Possibilities of improvement are indicated.