全球比拼微量元素分析，中国独占鳌头

2006年，在第20次国际分析地球化学实验室测试水平检验（GeoPT）中，全球72个实验室提交了微量元素分析结果。中国地质大学地质过程与矿产资源国家重点实验室取得可喜成绩，该实验室ICP—MS微量元素测试结果合格率名列第一。     

浙大建成二恶英实验室

浙江大学新建成了二恶英实验室。据悉,该文验室是目前国内能源研究领域中唯一有能力进行伞面二恶英研究的测试分析的实验室,也是目前国内面积最大、功能最全、设计最合理、仪器配置水平最高的具有罔际水准超痕量二恶英分析实验室。该实验室的建成,提供了一个集能源、环保、化工及分析测试等多学科知识、技术交叉的多功能学术交流平台。这也是目前我国大陆地区唯一一家被联合同环境保护署（UNEP）列入其全球持久性有机污染物实验室目录的二恶英实验室。     

基于半悬浮式光学基座的原子吸收分光光度计的车载适应性

针对原子吸收分光光度计的车载化需求,提出了一种半悬浮式光学基座的设计方案以减轻车载震动条件对仪器性能的影响.根据该设计方案制作了2台样机安装到检测车和实验室,分别在检测车行驶0、1000、2000km后同时进行了性能测试和土壤样品中有效铜、钙含量的测量.结果表明,该仪器于车载和实验室条件下3次测量的波长准确度与重复性、...     

全国土壤污染状况调查样品无机项目测试质控要求

云南省在全国土壤污染状况调查工作中,对调查样品无机类项目的测试,从方法选择、仪器配置、人员考核、实验室分析质量控制、原始记录与结果报告等方面,提出质量控制要求,以保证实验室检测结果的准确性和可比性.     

我国包装实验室首次参加国际组织比对--Labthink渗透仪参与世界知名阻隔性实验室数据比对

阻隔性数据的对比,在阻隔性测试领域中的重要性毋庸质疑．Labthink兰光在2004年9月由德国MECA-DI实验室组织的薄膜阻隔性测试中,作为参加比对的唯一一家中国实验室,为中国包装检测业赢得了国际话语权．通过这次测试数据的比对,有力地验证了上述论断．     

亚洲最大实验室综合大楼之一在上海落成

不久前,上海莱茵大厦全面投入运营,它是亚洲面积最大、技术最先进的独立检测综合楼之一。这座实验室大楼可以满足消费产品、机械和太阳能行业制造商的测试需求,拥有最先进的设备,可开展化学分析、电气安全、校准、适用性、物理和机械性测试。德国莱茵TUV集团将实验室和各种资源进行了优化整合,缩短了检测周期,目的在于更贴近客户,更快捷地为产品提供所需的测试服务,提升服务效率。     

第九届中国国际质量控制与测试工业设备展览会胜利闭幕

以无损检测技术及设备、物理测试与材料试验机、分析仪器与实验室设备、计量与测试技术为内容的《第九届中国国际质量控制与测试工业设备展览会》(简称：Q.C．China’2004)，已于2004年11月10日在上海国际展览中心圆满落下帷幕。     

水平测试样品的均匀性保证

为确保水平测试样品的均匀性，文中阐述了水平测试、样品制备、均匀性检验的取样数量、取样方式、最小取样量、测量方法和统计方法，重点介绍了均匀性检验的统计方法。     

大学生实验室安全教育探索与实践

大学生实验室安全教育是高校实验室安全管理工作的重要内容之一。为强化学生的安全意识,学院将“实验室安全及试剂基础知识”作为一个教育专题列入学院全体新生的专业导论课教学中。针对不同专业,有的放矢设置教学内容,寻找合适案例,精心设计课件。多种教学法相结合,以激发学生的学习兴趣。为使学生重视培训,在课程结束前安排10 min的随堂测试,并要求学生做出承诺：时刻保持高度警惕,严防实验室安全事故发生。通过培训,学生的实验室安全意识明显提高,为安全管理奠定了良好基础,充分体现了学院“以人为本,预防为先”的工作原则。     

CNAL/T0086水溶液pH值测定能力验证分析

2003年5～8月期间,中国实验室国家认可委员会组织了CNAL／T0086水溶液的pH值测定能力验证。本次能力验证由中国实验室国家认可委员会组织,国家标;住物质研究中心负责协调及实施。能力验证的目的是评价各实验室水溶液pH值测定的测试能力和测试水平。对测试结果的统计采用方便并为国际和区域承认的方法——稳健统计法,根据Z比分数评判各实验室的测试结果。     

氧指数检测能力验证结果分析

为了解氧指数检测实验室的能力水平,中国合格评定国家认可委员会(CNAS)开展了"塑料燃烧性能试验(氧指数法)"能力验证计划。通过对氧指数能力验证计划的结果进行统计分析,评价了氧指数检测实验室的整体水平,指出了氧指数检测实验室普遍存在的几类问题并提出了相应的建议。     

实验室能力验证的发展

实验室能力验证对于判定实验室的检测能力非常重要。回顾了国际实验室能力验证的起源和发展,重点分析了我国能力验证的发展历程和成就,探讨了我国实验室能力验证中存在的问题和有争议的技术要点。     

利用实验室间国际比对验证15N丰度的测定能力

参加了由FAO／IAEA组合的全氮和^15N丰度检测能力验证的实验室国际间的比对两年的比对结果表明,我们实验室对3个植株样品全氮和^15N丰度的测定值与指定值十分吻合,检测结果准确,此项计划的实施,证明了本实验室的检测能力和国际实验室间的水平。     

Proficiency testing in analytical laboratories: how to make it work

 This paper covers the role of proficiency testing schemes in providing an occasional but objective means of assessing and documenting the reliability of the data produced by a laboratory, and in encouraging the production of data that are "fit-for-purpose". A number of aspects of proficiency testing are examined in order to highlight features critical for their successful implementation. Aspects that are considered are: accreditation, the economics and scope of proficiency testing schemes, methods of scoring, assigned values, the target value of standard deviation σ_p, the homogeneity of the distributed material, proficiency testing in relation to other quality assurance measures and whether proficiency testing is effective. Stress is placed on the importance of any proficiency testing scheme adhering to a protocol that is recognised, preferably internationally. It is also important that the results from the scheme are transparent to both participating laboratory and its "customer". Received: 03 November 1995 Accepted: 20 November 1995     

水中易释放氰化物能力验证样品的研制及应用

根据国家地表水环境质量监测网监测任务要求和环境监测的实际需要,制备了水中易释放氰化物能力验证样品。通过均匀性、稳定性检验以及量值一致性评价,研制的样品均匀性良好,在3℃~6℃冷藏避光保存条件下1年内稳定,样品配制值与多家实验室协作测定结果一致。探讨了样品在能力验证活动中的应用,共有来自全国11个省的32家实验室参加了水中易释放氰化物的能力验证计划,实验室满意率在80%以上,实验室结果出现有问题或不满意主要是由于样品前处理以及检测过程质量控制不当导致的。经检测及实验室反馈的数据验证,该能力验证样品能够应用于能力验证活动。     

Quality issues in proficiency testing

 Proficiency testing is a means of assessing the ability of laboratories to competently perform specific tests and/or measurements. It supplements a laboratory's own internal quality control procedure by providing an additional external audit of their testing capability and provides laboratories with a sound basis for continuous improvement. It is also a means towards achieving comparability of measurement between laboratories. Participation is one of the few ways in which a laboratory can compare its performance with that of other laboratories. Good performance in proficiency testing schemes provides independent evidence and hence reassurance to the laboratory and its clients that its procedures, test methods and other laboratory operations are under control. For test results to have any credibility, they must be traceable to a standard of measurement, preferably in terms of SI units, and must be accompanied by a statement of uncertainty. Analytical chemists are coming to realise that this is just as true in their field as it is for physical measurements, and applies equally to proficiency testing results and laboratory test reports. Recent approaches toward ensuring the quality and comparability of proficiency testing schemes and the means of evaluating proficiency test results are described. These have led to the drafting of guidelines and subsequently to the development of international requirements for the competence of scheme providers. Received: 2 January 1999 · Accepted: 7 April 1999     

土壤中重金属元素检测的质量认证

探讨了土壤中重金属检测能力验证的质量控制措施,为确保能力验证结果的准确性及不断提高实验室的检测技术水平提供参考.     

Harmonization and transferability of performance assessment: experience from four serum aluminum proficiency testing schemes

Proficiency testing schemes monitor laboratory performance and provide a stimulus for improvement in accuracy. Where several schemes operate in the same analytical sector, there are risks that assessments of performance may be in conflict. Performance assessment for the determination of trace elements such as aluminum in serum is particularly important due to the high risk of contamination and therefore erroneous results. The objectives of this work were (1) to compare several mathematical models to establish a predefined standard deviation for proficiency assessment and (2) to evaluate the influence of instrumental methods and proficiency testing scheme on the assessment of performance for serum aluminum measurements. For this purpose, three samples were sent to the participants of four proficiency testing schemes. Assigned values were calculated according to algorithm A according to ISO 13528 and standard deviation for proficiency assessment according to three methods based on individual variability, state of the art or previous proficiency testing results. The method based on individual variability produced a more stringent standard deviation compared to analytical imprecision based on the state of the art. The instrumental methods gave similar results, whereas significant differences were observed between the four proficiency testing schemes indicating that harmonization of the standard deviation for proficiency assessment fails to allow transferability from one proficiency testing scheme to another and that additional factor(s) contribute to variability in performance assessment.     

Regular participation in proficiency testing provides long term improvements in laboratory performance: an assessment of data over time

Data from various proficiency testing schemes, operated by LGC Standards, was collated and reviewed to determine whether regular involvement within third party, proficiency testing, either over a prolonged period of time or via multiple participation, had improved the performance of those laboratories taking part. Three statistical evaluations were applied to historical PT results, a review of improvements over time, demonstrated by the evaluation of satisfactory performance scores achieved, a review of the relative robust standard deviations obtained from multiple methods and a focused review of one analyst participating in proficiency testing over a prolonged period of time. In each case the data indicated that long term participation and evaluation via proficiency testing had resulted in consistent and sustained improvements in laboratory performance.     

Proficiency testing for the improvement of analytical practice

The results of an individual laboratory??s participation in proficiency testing are often taken in isolation. A single poor assessment may be investigated, or a trend of participation over time may be charted. However, the overall results of proficiency testing (over all participants and over time) may also provide some insights into aspects of the analysis being undertaken. Two examples are summarised here. Analysis of sodium in various foods appears to be difficult with no obvious method trends. Analysis of vitamin B₂ in liquid dietary supplement requires enzymatic dephosphorylation, as well as acidic digestion. In the latter case, some participants appear to have changed their method since the first reporting of the problem. Investigation of proficiency testing results and the implications for the analysis takes time and requires data sets to be retrieved from archive. This may not be the highest priority in the workload of a busy proficiency testing provider. However, the benefits to the analytical community from such investigations are great, and their reporting is to be encouraged.