摘要
表面张力是液体重要的基本性质之一,对其准确测量对工业生产、科学研究有着重要的作用。目前对于表面张力的测量不确定度缺乏细致深入的评定,表面张力仪的校准工作缺乏相应的依据。对基于铂金板法和铂金环法的表面张力示值误差的测量不确定度进行了研究,结果表明:示值误差的不确定度主要来源于测量数据重复性及方法参考值的不确定度,其中参考值的不确定度主要来源于探针的测量尺寸引入的不确定度,专用砝码和重力加速度引入的不确定度小于测量尺寸引入的不确定度;对于具有同样测量重复性水平的仪器,铂金板法测量的示值误差不确定度大于铂金环法。
Surface tension is one of the most important basic properties of liquid.Accurate measurement of surface tension plays an important role in industrial production and scientific research.At present,calibration of surface tensiometers in China lacks foundation due to the lack of detailed research on evaluation of measurement uncertainty of surface tension.This paper studies the measurement uncertainty in the error of indication of surface tensiometers based on the platinum plate method and the platinum ring method.The results showed that the main uncertainty components come from the measurement repeatability and the reference value.The uncertainty of reference value mainly comes from the probe size.The uncertainty caused by the special weights and the gravity acceleration is less than that caused by the probe size.For the same level of measurement repeatability,the uncertainty in the error of indication of a surface tensiometer based on the platinum plate method is greater than that of a surface tensiometer based on the platinum ring method.
作者
王梅玲
王海
张贵仁
张艾蕊
韩艳祥
WANG Meiling;WANG Hai;ZHANG Guiren;ZHANG Airui;HAN Yanxiang(National Institute of Metrology,Beijing 100029,China;Shanghai Institute of Metrology and Testing Technology,Shanghai 201203,China;China University of Petroleum College of Chemical Engineering and Environment,Beijing 102249,China)
出处
《计量科学与技术》
2021年第10期27-30,34,共5页
Metrology Science and Technology
基金
国家重点研发计划课题(2017YFF0204703)
国家自然科学青年基金资助项目(51501173)。
关键词
表面张力
不确定度
铂金板法
铂金环法
surface tension
measurement uncertainty
platinum plate method
platinum ring method
