食品药品检验机构仪器设备计量信息的标准化管理

建立食品药品检验机构仪器设备计量的信息化规范管理方法。总结了传统人工计量管理的弊端,提出计量信息化管理的流程,将计量信息化管理分为计量计划申报、计量应急申报、计量信息登记、计量结果确认4个步骤,详细介绍了4个步骤中信息管理的主要内容及注意事项。建立食品药品检验机构仪器设备计量信息化管理的标准化规程,可以为仪器设备计量信息的动态监管提供支持。     

中国标准化论坛暨第五届标准样品技术论坛(第二轮通知)北大核心CSCD

围绕第12届中国标准化论坛大主题“标准化改革与发展之大机遇”,为促进我国标准样品发展,进一步推动我国标准样品生产、应用和管理等工作,促进标准物质/标准样品相关领域专家、学者及企业的沟通和联系,加强国际间的交流与合作,提升技术创新能力,中国标准化论坛暨第五届标准样品技术论坛由上海材料研究所承办,定于2015年6月15-17日在上海召开。     

中国标准化论坛暨第五届标准样品技术论坛(第一轮通知)

<正>为促进我国标准样品发展,进一步推动我国标准样品生产、应用和管理等工作,促进标准物质/标准样品相关领域专家、学者及企业的沟通和联系,加强国际间的交流与合作,提升技术创新能力,中国标准化论坛暨第五届标准样品技术论坛由上海材料研究所承办,定于2015年6月中旬在上海召开。届时,会议邀请行业中的国内外专家学者就国内外标准样品的发展现状,标准样品的研制技术,标准样品在各行业中的应用进行专题讨论和学术交流。竭诚欢迎     

中国标准化论坛暨第五届标准样品技术论坛(第一轮通知)

<正>为促进我国标准样品发展,进一步推动我国标准样品生产、应用和管理等工作,促进标准物质/标准样品相关领域专家、学者及企业的沟通和联系,加强国际间的交流与合作,提升技术创新能力,中国标准化论坛暨第五届标准样品技术论坛由上海材料研究所承办,定于2015年6月中旬在上海召开。届时,会议邀请行业中的国内外专家学者就国内外标准样品的发展现状,标准样品的研制技术,标准样品在各行业中的应用进行专题讨论和学术交流。竭诚欢迎     

《化学分析计量》征稿启事

《化学分析计量》是全国性分析测试、化学计量专业技术期刊,是中国科技核心期刊,入选美国《化学文摘》(CA)千种表。主要栏目有标准物质、不确定度、分析测试、仪器设备、计量管理、样品处理、综述等。重点报道分析测试和化学     

中国标准化论坛暨第五届标准样品技术论坛(第一轮通知)

<正>为促进我国标准样品发展,进一步推动我国标准样品生产、应用和管理等工作,促进标准物质/标准样品相关领域专家、学者及企业的沟通和联系,加强国际间的交流与合作,提升技术创新能力,中国标准化论坛暨第五届标准样品技术论坛由上海材料研究所承办,定于2015年6月中旬在上海召开。届时,会议邀请行业中的国内外专家学者就国内外标准样品的发展现状,标准样品的研制技术,标准样品在各行业中的应用进行专题讨论和学术交流。竭诚欢迎     

中国标准化论坛暨第五届标准样品技术论坛(第二轮通知)

<正>围绕第12届中国标准化论坛大主题"标准化改革与发展之大机遇",为促进我国标准样品发展,进一步推动我国标准样品生产、应用和管理等工作,促进标准物质/标准样品相关领域专家、学者及企业的沟通和联系,加强国际间的交流与合作,提升技术创新能力,中国标准化论坛暨第五届标准样品技术论坛由上海材料研究所承办,定于2015年6月15-17日在上海召开。届时,会议将邀请行业中的国内外专     

酱油中3-氯-1，2-丙二醇检测实验室间比对分析

介绍了由中国计量科学研究院化学所负责实施的酱油中3-氯-1,2-丙二醇检测实验室间比对情况,并针对该项目的检测方法、标准物质选择、前处理方法等进行了技术分析。21家参加比对实验室对样品l检测结果满意率85．7％,样品2结果满意率100％。建议实验人员在检测中可通过空白加标或应用质控样品等手段提高检测结果的准确度。     

北京矿冶研究总院 测试研究设计所/国家重有色金属质量监督检验中心

<正>以矿石、选冶产品、有色金属材料、矿用药剂、环境样品、稀贵金属、再生金属的检测及质量评价为核心,开展检测技术及标准化研究,为企业提供委托检验、仲裁检验、质量评价、方法开发、实验室设计及技术培训等专业化服务。拥有完善的ISO/IEC17025实验室管理体系,同时拥有CNAS国家实验室认可、CMA国家实验室资质认定、CAL     

上海自贸区检验检测机构认证申请已开始

<正>2014年4月1日起,上海市质监局自贸区分局开始受理产品质量检验机构计量认证申请、产品质量检验机构资格审批申请和机动车安全技术检验机构资格许可申请,并代为送达有关法律文书和证书。自贸区内检验检测机构可以就近在自贸区分局受理窗口办理检验检测资质申请,这将为自贸区内检验检测机构提供便利。据了解,上海市质监局正在推进自贸区内检验检测机构资质认定审批告知承诺制落地,预计今年第三季度正式实     

The Rapid Measurement of ABO Blood Type by Using SPR(Surface Prasmon Resonance) Sensor

The conventional measurement of ABO blood-types is visual inspection method based on the aggregation reaction with monoclonal antibody. But, this method takes a long time (one night) and requires the skilled analyzer to decide the blood-types for the saliva and bloodstain sample. Therefore, the rapid and sensitive measurement of ABO blood type has been required for the saliva and bloodstain on the clothes. Surface prasmon resonance (SPR) is an optical technique, which has been applied to biosensing. In this study, the rapid and sensitive measurement of ABO blood-types were investigated by using SPR sensing system.     

元素相对测量不确定度的评估

根据ISO17025的要求以及国家计量技术规范JJF1059—1999的指引,结合元素相对测量的特点,总结了一套检验实验室不确定度的评估方法。由于元素测量前处理过程中被测物的变化很难估计,所以直接以多次重复测量数据为依据,即以A类评定为主、B类评定为辅的方法,使得结果更为客观、准确,完全适合实际操作。     

Compliance with legal requirements: definition of limits, sampling and measurement uncertainty

In many cases compositional requirements for foodstuffs (e.g. limits for the fat, protein, dry matter, or water content) are established by legislation. Adequate compliance testing is possible only if limits are clearly defined, taking measurement and sampling uncertainty into consideration. Furthermore, decisions on compliance must be based on samples which reflect the composition of the quantity to be evaluated. The resulting sample sizes are normally regarded by food inspection authorities as being much larger than acceptable. Consequently, an alternative strategy should be developed. Autocontrol data (i.e. inspection results obtained by the factory) in principle provide an adequate data basis for decisions on compliance. However, they must be reliable and the food inspection authority must have access to these data on request. Using these data and on condition that they show an approximate normal distribution, an inspection strategy based on arithmetic mean and standard deviation can be developed. Reliable and transparent decisions on compliance can thus be made. In many cases an adequate verification of food authenticity requires a comparison of raw material and product composition. Maximum acceptable differences, taking the relevant sources of variation into consideration, have to be defined and should be used instead of limits. Received: 17 April 2002 Accepted: 23 June 2002     

Droplet-based microfluidic lab-on-a-chip for glucose detection

A microfluidic lab-on-a-chip (LoC) platform for in vitro measurement of glucose for clinical diagnostic applications is presented in this paper. The LoC uses a discrete droplet format in contrast to conventional continuous flow microfluidic systems. The droplets act as solution-phase reaction chambers and are manipulated using the electrowetting effect. Glucose is measured using a colorimetric enzyme-kinetic method based on Trinder’s reaction. The color change is detected using an absorbance measurement system consisting of a light emitting diode and a photodiode. The linear range of the assay is 9-100 mg/dl using a sample dilution factor of 2 and 15-300 mg/dl using a sample dilution factor of 3. The results obtained on the electrowetting system compare favorably with conventional measurements done on a spectrophotometer, indicating that there is no change in enzyme activity under electrowetting conditions.     

基于平台化的计量器具管理系统

介绍基于平台化的计量器具管理系统的设计与实现方法。以计量器具管理为研究对象,分析了目前平台化计量器具管理系统特点和功能,并借鉴国内外研究现状和发展趋势,提出了平台化计量器具管理系统开发的必要性和优势,讨论了平台化计量器具管理系统研究目标和内容,对平台化计量器具管理系统研究方案及关键技术解决途径进行了分析。平台化计量管理系统依据计量标准开发研制,由计量和标准化方面的专家提出功能设置。该系统简化了管理层次,可提高计量管理的科技水平和市场竞争能力,满足计量管理人员的需求。     

广西污水中汞、砷检测能力验证结果分析

利用能力验证计划,对广西全区检验检测机构的污水中汞、砷分析能力进行对比和评价。采用单因子方差对考核样品进行均匀性检测,对全区144家检验检测机构的检测结果进行四分位稳健统计分析,用Z比分值绘制柱状图直观评定各检测机构的测试结果。污水中汞检测结果合格率为77.0%,砷检测结果合格率为84.8%。广西检验机构的汞、砷总体检测能力较强,少数检测机构的检测能力和水平有待提高。     

Evaluation of novel sample identification approach based on chromatographic fingerprint set correlation homogeneity analysis

Instead of usual rationale for chromatographic fingerprint based sample identification which relies upon visual inspection or principal component analysis of raw or aligned chromatograms novel nonparametric statistical measure of fingerprint set homogeneity is proposed. Randomization test is applied for significance analysis of fingerprint set homogeneity while average maximum crosscorrelation is used as a merit function. Chromatogram sets generated by random selection from standard and unknown sample chromatogram collections are compared with respect to merit function values with set of chromatograms that represents standard and/or unknown sample. In that instance fingerprint homogeneity significance is represented by the fraction of random chromatogram sets that have higher merit values than the standard and/or unknown sample sets. A set of peptide maps corresponding to different haemoglobin variants has been selected for evaluation of proposed test. This approach is compared to chromatogram alignment based on correlation optimized warping coupled with principal component or cluster analysis. Proposed method is simple i.e. straightforward sample identification procedure which reliability has been evaluated here. Impact of this approach on peptide mapping validation and system suitability analysis is discussed.     

基于光度法的高精度海水pH值测量系统

基于光度法的海水pH值自动测量系统测定速度快,精密度高,是海洋酸化和碳循环研究急需的测量装置.本研究以光度法和流动注射分析技术为基础,通过整合泵阀流路体系、LED光源、流通池和光谱仪,研发了海水pH值自动测量系统.本系统在分析过程中不易产生气泡,利用指示剂在样品中的浓度变化校正指示剂的加入带来的测量偏差,操作简单方便,测量一个样品用时约为1.5 min,精密度为0.0013,准确度为0.0059,可在实验室或调查船中对所采集的海水快速地进行高精度pH值测量.     

Continuous spectrophotometric determination of copper, nickel and zinc in copper-base alloys by flow-injection analysis

Flow-injection methods have been developed for the determination of copper, nickel and zinc in copper-base alloys, including several types of brasses, deoxidized copper, beryllium copper and German silver. The system for copper and nickel involves the measurement of the absorbance of the copper(II) and nickel(II) aquo-complexes at 805 and 410 nm, respectively, after simple dissolution of the sample in a nitric acid-phosphoric acid mixture. The system needs no further reagents and the sample solutions can be analysed at rates of up to 280 /hr for copper (or nickel in German silver) without any carry-over. The system for zinc consists of automatic dilution of the injected sample with a thiosulphate-acetate buffer solution and the subsequent measurement of the absorbance of the zinc-Xylenol Orange complex at 568 nm. This system permits analysis rates of up to 90/hr for zinc solutions, with no carry-over. The procedures have been applied to standard copper-base alloys. The results agreed satisfactorily with the certified values. The precision ranges are 0.2-0.7% for copper and nickel and 0.5-0.8% for zinc.     

A study of flux monitoring for instrumental neutron activation analysis

The accuracy of instrumental neutron activation analysis is dependent upon measurement of the neutron flux to which samples are submitted. Flux monitoring techniques described and evaluated include: target cooling water activity, BFa counters, plastic scintillators, and a simple reference sample system. Evaluation is made on the basis of results obtained for oxygen analysis using primary standard materials. The superiority of the reference sample system for flux measurement during irregular neutron flux production is shown.