Proficiency Testing Program for iodine in refined salt organized by Adolfo Lutz Institute - São Paulo, 2014

Abstract

 This paper presents the Proficiency Testing Program for determination of  iodine in refined salt, organized in 2014 by Adolfo Lutz Institute, in São  Paulo, in order to provide a metrology tool to evaluate the performance  of the participants, especially those who support the National Program  for Monitoring Iodine in Salt. The iodized refined salt used to perform the  PEP, was considered sufficiently homogeneous and stable for proficiency  testing program. Among the thirty four participating laboratories 27 (79%)  had satisfactory performance, 3 (9%) had questionable performance,  and 4 (12%) showed unsatisfactory performance, revealing the need for  corrective actions in order to identify and correct any problems that may  have influenced the results. It is considered that the provision of Proficiency  Testing Programs for iodine in salt should be conducted more frequently in  order to assure continuous improvement of measurement procedures and  increase metrological reliability. It is expected that, with this type of action,  increase public safety in relation to the adequate intake of io dine.