首页 馆藏资源 舆情信息 标准服务 科研活动 关于我们
现行 ASTM E542-22
到馆提醒
收藏跟踪
购买正版
Standard Practice for Gravimetric Calibration of Laboratory Volumetric Instruments 实验室容量仪器重量校准的标准实施规程
发布日期: 2022-01-01
1.1 本规程涵盖了体积仪器的校准程序,包括化学、分析、临床和校准实验室中常用的玻璃器皿、塑料器皿和实验室标准。它基于在校准温度下所含或交付的纯水量的重量测定,并将该值转换为给定参考温度(通常为20℃)下的体积 °C,通过适当的方程式。不包括使用汞进行校准。如果证明并记录获得的结果与使用本文所述方法获得的结果等效,则可以使用替代重量分析方法进行校准。 提供了替代参考温度和相关方程。 1.2 本规程旨在涵盖0.1极限之间的体积容量仪器 厘米 3. 和10 000 厘米 3. . 本规程范围内的典型容量仪器包括刻度为“输送”的滴定管、刻度量筒、容量瓶、测量和稀释移液管、转移和容量移液管,如规范中的移液管 E694型 比重瓶,如ASTM标准中使用的比重瓶,以及金属体积标准,如法定计量中使用的比重瓶。 1.3 对于容量低于0.1的容量仪表,不建议使用该程序进行校准 厘米 3. ,例如不包含蒸发校正的微晶玻璃器皿;未提供蒸发方法和校正。中给出的容量 1.2 不是最大容量限制;体积大于10 000 厘米 3. 可以使用此程序进行校准。最大容量限制基于可用设备、标准、足量纯净水以及安全处理大型容量仪器的能力。 1.4 本标准可用于校准由玻璃、塑料、各种稳定金属或任何其他稳定材料制成的体积仪器,前提是有适当的体积膨胀系数。 1.5 本标准并非旨在解决与其使用相关的所有安全问题(如有)。本标准的用户有责任在使用前制定适当的安全、健康和环境实践,并确定监管限制的适用性。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒(TBT)委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。
1.1 This practice covers procedures for use in the calibration of volumetric instruments that include glassware, plasticware, and laboratory standards that are in common use in chemical, analytical, clinical, and calibration laboratories. It is based on the gravimetric determination of the quantity of pure water, either contained or delivered at a calibration temperature, and the conversion of this value to a volume at a given reference temperature, normally 20 °C by means of suitable equations. Calibration using mercury is excluded. Calibration may be performed using alternative gravimetric methodology, if it is demonstrated and documented that the results obtained are equivalent to those obtained using the methodology described herein. Alternative reference temperatures and associated equations are provided. 1.2 This practice is intended to encompass volume capacity instruments between the limits of 0.1 cm 3 and 10 000 cm 3 . Typical volumetric instruments falling within the purview of this practice are burettes graduated “to deliver,” graduated cylinders, volumetric flasks, measuring and dilution pipettes, transfer and capacity pipettes such as those in Specification E694 , specific gravity flasks such as those used in several ASTM standards, and metallic volumetric standards such as those used in legal metrology. 1.3 The procedures are not recommended for calibration of volumetric instruments with capacities below 0.1 cm 3 , such as microglassware without incorporating evaporation corrections; evaporation methods and corrections are not provided. Capacities given in 1.2 are not intended to be maximum capacity limitations; volumes greater than 10 000 cm 3 may be calibrated with this procedure. Maximum capacity limitations are based on available equipment, standards, adequate quantities of pure water, and the ability to safely handle large volumetric instruments. 1.4 This standard may be used for the calibration of volumetric instruments made from materials of glass, plastic, various stable metals, or any other stable materials provided appropriate volumetric coefficients of expansions are available. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
分类信息
关联关系
研制信息
归口单位: E41.01
相似标准/计划/法规