Calibration, handling repeatability, and the Maximum Permissible Error of single-volume glass instruments |
| |
Authors: | Veronika R Meyer Josef Pfohl Burkhard Winter |
| |
Institution: | (1) EMPA, Swiss Federal Laboratories for Materials Science and Technology, Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland;(2) Brand GmbH, Postfach 1155, 97861 Wertheim, Germany;(3) DIN Normenausschuss Labor, Theodor-Heuss-Allee 25, 60486 Frankfurt am Main, Germany |
| |
Abstract: | The influence quantities for the uncertainty of a volumetric operation with glass instruments are calibration, repeatability
and temperature. In the literature, measurement uncertainty budgets can be found, which count all three quantities separately
although calibration and repeatability are merged in tabulated data to the Maximum Permissible Error. We propose that this
error should be handled as a rectangular distribution in order to get a standard uncertainty. For the daily use in an analytical
laboratory, the combined standard uncertainty of a volumetric operation is thus calculated from the Maximum Permissible Error
plus the uncertainty of the temperature influence. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|