Bi-lateral comparison of 500 ml flask

Project Description

The purpose of the comparison is to identify any problems regarding meniscus reading during the calibration of a volumetric flask. The protocol to be used is the one from the project "Comparison of a 50 ml pycnometer and 500 ml flask "

Final report 2016-12-07

The project has been completed and the report can be downloaded here>>

In this bilateral comparison between IPQ and FORCE, it was used a similar standard as the one used for "Guide on the calibration, operation and handling of micropipettes", a 500 ml flask.The volume results are quite similar and consistent with each other and with the determined reference value.
The uncertainty values of the determined volumes are very similar for both laboratories.
After this comparison FORCE laboratory could identify the error in the project "Comparison of a 50 ml pycnometer and 500 ml flask", an incorrect expansion coefficient that was the cause for the inconsistent result.