2001年湖北省建工检测实验室间水泥比对结果偏差的原因分析

能力验证是判断和监督实验室能力的一项重要、有效的手段 ,它是为确定某类实验室进行某项特定检测能力以及监控其持续能力而进行的一种实验室间比对。为了进一步推动和提高我省建工检测实验室的技术能力和管理水平 ,在湖北省计量认证办公室的帮助和指导下 ,湖北省建设工程质量检测与安全监督管理总站于 2 0 0 1年 9月组织实施了湖北省建工检测实验室间的水泥物理性能检验比对。本文将有关情况报告如下。1　概述本次能力验证整个过程依据ＧＢ/Ｔ1 5481 -2 0 0 0《检测和校准实验室能力的通用要求》、ＧＢ/Ｔ1 5483 .1 -1 999《利用实验室间比…     

加强实验室间比对的能力验证确保实验室的持续能力

1　实验室间比对和能力验证的定义与作用实验室间比对是指按照预先规定的条件 ,由两个或多个实验室对相同或类似的被测物品进行检测的组织实施和评价。而能力验证则是利用实验室间比对确定实验室的检测能力。国家质量监督检验检疫总局对法定计量检定机构的定期考核和中国实验室国家认可委员会对校准、检测实验室的认可 ,其目的都是引进质量管理思想和程序运用 ,规范实验室质量体系和技术能力。而要考核和监督其持续有效运行 ,参加实验室间比对和能力验证则是一种极为有效的方法。对计量系统的校准、检测实验室来说 ,通过中国实验室国家认可…     

能力验证活动在建筑工程实验室管理中的应用

为适应建筑工程检验机构深化改革的需要．评价湖北省建工实验室的检验能力．从2001年至2003年．省质量技术监督局计量认证办公室与湖北省建设工程质量安全监督总站连续3年实施了湖北省建工实验室间的性能比对能力验证，这是我省建工实验室在宣贯执行《评审准则》和GB／T15481-2000((检测和校准实验室能力的通用要求》后，加强检     

纺织品检测实验室常用质量控制评价方法

实验室质量控制是确保实验室检测数据准确的重要监控手段,本文汇总了纺织品检测实验室常用的质量控制评价方法,包括数值型和非数值型结果的评价,涉及了实验室间比对、留样复测、仪器比对、人员比对和目光比对等质量控制方法。     

环境监测实验室水中氟化物检测能力及检测方法比对分析

为了解环境监测实验室水中氟化物的检测能力,中国环境监测总站组织349家实验室开展水中氟化物检测实验室间比对。比对样品为单独定制的成对样品,指定两种较为常用的检测方法,参加实验室可以选用离子选择电极法或离子色谱法进行检测,采用稳健四分位统计方法分析评价比对结果。实验表明,参加比对实验室中采用离子选择电极法的结果满意率为74.8%,采用离子色谱法的结果满意率为76.8%,两种检测方法的结果中位值较为接近,离子色谱法的结果变异性相对较小。参加实验室水中的氟化物总体检测水平较好,个别结果偏差较大,应进一步查找原因,提高能力。     

水系沉积物中重金属检测的实验室间比对结果及分析

本文介绍了两家实验室参加的水系沉积物中重金属检测实验室间比对结果分析。实验检测使用水系沉积物标准物质作为比对样品,比对项目为标准品中Cu、Pb、Zn、Cd、Cr、As的含量测定结果,检测结果依据CNAS2014年新颁布的《能力验证结果的统计处理和评价指南》(CNAS-GL02:2014)中规定的En值法判定。比对结果表明,对于比对项目Cu、Pb、Zn、Cr、As,参加比对的两家实验室结果判定均为满意;对于比对项目Cd,A实验室结果判定为满意,B实验室结果判定为不满意。对于不满意的结果,通过对实验室内部检测过程的分析找出原因,从而促进该实验室在内部管理水平和检测能力的提升。     

能力验证与实验室间比对及其结果处理

能力验证和实验室间比对是两种重要的外部质控方式,对于合格评定机构,除了《能力验证规则》(CNAS-RL02)的要求之外,省级质监局和一些行业的检测实验室,如疾控系统实验室,每年都会定期组织全省范围内的实验室间比对试验,这两种试验活动对于技术能力的维持和及时识别实验室存在的问题,以便制定相应的补救措施十分必要。     

留样再测与检测结果控制限评价的方法

CNASCL01：2006《检测和校准实验室能力认可准则》（ISO/IEC17025：2005）和《实验室资质认定评审准则》要求实验室为确保检测结果的准确可靠应采取一定的措施控制,如通过人员间比对、实验室间比对、留样再测等方法进行控制,确保实验室检测能力.其中留样再测是考核实验室能力较为常用、便捷的方式。     

量块校准能力验证结果不满意之原因分析和改善

能力验证的目的是利用实验室间比对或测量审核确定实验室的校准/检测能力或检查机构的检测能力.任何用于监视实验室能力的实验室间比对和测量审核的活动称为能力验证活动.文章从不确定度分析、误差与数据处理、校准程序等3个方面,对参加量块校准能力验证活动的实验室的验证结果进行深入分析,给出可能导致验证结果不满意的3种常见原因.针对...     

加强实验室间比对的能力验证确保实验室的持续能力

实验室间比对是指按照预先规定的条件，由两个或多个实验室对相同或类似的被测物品进行检测的组织实施和评价。而能力验证则是利用实验室间比对确定实验室的检测能力。     

Gender differences in publication productivity in psychology in India

An analysis of gender differences in psychology in India provides quantitative and qualitative assessment of R&D output contributed by psychologists with the indication of the trend of growth, skewness, relatedness, co-authorship pattern of productivity.     

Metrology in Chemistry in Germany

The system for Metrology in Chemistry in Germany is described. At the national standards level, a network of high-level chemistry institutes coordinated by the national metrology institute, PTB, provides the primary references for chemical measurements. A dissemination mechanism employs chemical calibration laboratories accredited within the framework of the German Calibration Service (DKD). They act as “multipliers” between the national standards level and the user level by providing the user with calibration means which are traceable to the SI via national standards. Traceability structures in clinical chemistry, electrochemistry, elemental analysis and gas analysis are described     

Natural radioactivity in drinking water in private wells in Finland

Radiation Protection Dosimetry     

Natural radioactivity in drinking water in private wells in Finland

Natural radioactivity in drinking water was determined in population-based random study of 472 private wells. The mean concentrations of (222)Rn, (226)Ra, (234)U, (238)U, (210)Pb and (210)Po in drilled wells were 460, 0.05, 0.35, 0.26, 0.04 and 0.05 Bq l(-1), and in wells dug in the soil were 50, 0.016, 0.02, 0.015, 0.013 and 0.007 Bq l(-1), respectively. Approximately 10% of the drilled wells exceeded a radon concentration of 1000 Bq l(-1) and 18% a uranium concentration of 15 microg l(-1). The mean annual effective dose from natural radionuclides for a drilled well user was 0.4 mSv and 0.05 mSv for a user of a well dug in the soil. The effective dose arising from (222)Rn was 75% of the total of all natural radionuclides for drilled well users. As regards long-lived radionuclides, (210)Po and (210)Pb caused the largest portion of the effective dose. The dose arising from (238)U, (234)U and (226)Ra was only 8% of the total of all natural radionuclides.     

Trends in alcohol-impaired driving in Canada

While a general decreasing trend in the number of persons killed in a traffic crash involving a drinking driver has occurred in Canada since the 1980s, it is evident that much of this decrease occurred in the 1990s. Since 2002, less progress has been made as the number of persons killed in crashes involving drinking drivers remains high. To better understand the current situation, this paper describes trends in drinking and driving in Canada from 1998 to 2011 using multiple indicators based on data collected for the Traffic Injury Research Foundation's (TIRF) Road Safety Monitor (RSM), the National Opinion Poll on Drinking and Driving, and trends in alcohol-related crashes based on data collected for TIRF's national Fatality Database in Canada. There has been a continued and consistent decrease in the number of fatalities involving a drinking driver in Canada. This remains true when looking at the number of fatalities involving a drinking driver per 100,000 population and per 100,000 licensed drivers. This decreasing trend is also still apparent when considering the percentage of persons killed in a traffic crash in Canada involving a drinking driver although less pronounced. Data from the RSM further show that the percentage of those who reported driving after they thought they were over the legal limit has also declined. However, regardless of the apparent decreasing trend in drinking driving fatalities and behaviour, reductions have been relatively modest, and fatalities in crashes involving drivers who have consumed alcohol remain high at unacceptable levels.     

Radioactivity in building materials in Iraq

Activity concentrations of (226)Ra, (232)Th and (40)K in 45 samples of different building materials used in Iraq were measured using gamma-spectroscopy system based on high-purity germanium detector with an efficiency of 40 %. Radium equivalent activity, air-absorbed dose rate, annual effective dose, external and internal hazard indices and alpha index due to radon inhalation originating from building materials were measured to assess the potential radiological hazard associated with these building materials. The activity concentrations of the natural radionuclides (226)Ra, (232)Th and 40K were found to range from below detection limit (BDL) to 223.7 ± 9, BDL to 93.0 ± 3 and BDL to 343.1 ± 12, respectively. Values of average radium equivalent activity, air-absorbed dose rate, indoor and outdoor annual effective doses, external and internal hazard indices and alpha index ranged from 6.5 to 124.9, 16.2 to 89.5 (nGy h(-1)), 0.08 to 0.44 mSv, 0.02-0.11 mSv, 0.09 to 0.53, 0.13 to 0.69 and 0.03 to 0.62, respectively. These values indicate a low dose. Therefore, the building materials used in the current study are quite safe to be used as building materials.