|Proficiency Test on
Caustic Soda finished
The full report can be downloaded (as .pdf-file). To download the report, please click the right mouse button and choose the "save as" option.
Summary of this proficiency test:
On 21 November 2014, the proficiency test on Caustic Soda (iis14C06) was finished. It started on 20 August 2014 (see message "Proficiency Test on Caustic Soda started" on this website) when the samples were distributed.
In this interlaboratory study 30 participants in 18 different countries have participated.
The participants were requested to determine Appearance, Density, Sodium, Alkalinity and iron.
The proficiency test report summarises per test, the test results, the analytical methods reported by the participants and the z-scores calculated for each participant are tabulated. Also, for each test, the calculated summary (e.g. mean, standard deviation and reproducibility) is given.
In the report also an evaluation of the test results is given. Problems encountered in the analyses are mentioned and - where possible - suggestions for quality improvement are formulated. For each test a comparison is made between the results of the group of participants and the requirements given by the relevant standard (e.g. ISO, DIN, ASTM).