Certain features of will be down for maintenance the evening of Friday August 18th starting at 8:00 pm CDT until Saturday August 19th at 12:01 pm CDT.   Please note that you still have telephone and email access to our local offices. We apologize for any inconvenience.

Training videos

Sigma Aldrich Proficiency Testing Reporting Portal: On this page you will find recorded presentations on how to use the portal, in various local languages. The presentations are given by the Sigma-Aldrich PT support team, and if you have any additional questions, they will be happy to take your calls and emails. Their details can be found at the end of the presentation.
Once you have seen the training presentation, the reporting portal can be accessed here

Proficiency testing data entry portal

Sigma-Aldrich Ringversuchs-Portal

Portail d’entrée des données de proficiency testing

Portale per l’inserimento dati dei proficiency test o circuiti interlaboratorio

Portal para la introducción de datos de los estudios interlaboratorios