供应美国NIST可追溯冰冻人血液中的微量金属标准物质SRM 1401

供应美国NIST可追溯冰冻人血液中的微量金属标准物质SRM 1401

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This Standard Reference Material (SRM) is intended primarily for use in the validation of analytical methods for measuring the concentrations of trace metals in human blood as well as for quality assurance and proficiency testing with respect to such methods. A unit of SRM 1401 consists of four vials of frozen human blood, two vials each of two different concentration levels. Each vial contains nominally 1.6 mL of human whole blood.The development of SRM 1401 was a collaboration between the National Institute of Standards and Technology (NIST), the Centers for Disease Control and Prevention (CDC), National Centers for Environmental Health, Division of Laboratory Sciences (Atlanta, GA) and LGC (Teddington, Middlesex, UK). 美国NIST可追溯冰冻人血液中的微量金属标准物质

Certified Mass Concentration Values: Certified mass concentration values for four elements in Level 1 and four

elements in Level 2 of SRM 1401 are listed in Table 1. A NIST certified value is a value for which NIST has the highest confidence in its accuracy in that all known or suspected sources of bias have been investigated or taken into account [1]. The certified values in this material are the weighted means [2–4] of the individual sets of measurements made by NIST and collaborating laboratories. The associated expanded uncertainties include between-laboratory and within-laboratory components of uncertainty and are provided at the 95 % level of confidence [5]. The measurands are elements listed in Table 1. Metrological traceability is to the SI derived units for mass concentration (expressed as micrograms per liter).Information Values: Information values for the mass concentration of nickel and blood density are provided in Table 2. An information value is considered to be of interest to the SRM user, but insufficient information is available to assess the uncertainty associated with the value, or only a limited number of analyses were performed [1].Information values cannot be used to establish metrological traceability.

本标准参考物质(SRM)主要用于验证测量人体血液中微量金属浓度的分析方法,以及用于此类方法的质量保证和能力测试。SRM 1401的一个单元由四瓶冷冻人体血液组成,每瓶两种不同的浓度水平。每个小瓶标称含有1.6毫升人类全血。SRM 1401的开发是由美国国家标准与技术研究所(NIST)、美国疾病控制与预防中心(CDC)、美国国家环境卫生中心、实验室科学部(佐治亚州亚特兰大)和LGC(英国米德尔塞克斯州特丁顿)合作完成的。

认证质量浓度值:1级和4级中四种元素的认证质量浓度

SRM 1401的级别2中的元素在表1中列出。NIST认证值是指NIST对其准确性具有最高信心的值,因为所有已知或怀疑的偏差源都已被调查或考虑[1]。本材料中的认证值是NIST和合作实验室进行的单组测量的加权平均值[2-4]。相关的扩展不确定性包括实验室之间和实验室内部的不确定性组成部分,并以95%的置信水平提供[5]。被测对象是表1中列出的元素。计量可追溯性是指质量浓度的SI衍生单位(以微克/升表示)。信息值:表2中提供了镍质量浓度和血液密度的信息值。SRM用户认为信息值感兴趣,但没有足够的信息来评估与该值相关的不确定性,或者只进行了有限数量的分析[1]。信息值不能用于建立计量可追溯性。