Technical workshop organised by ielab and the Spanish Type Culture Collection (CECT), where also will participate the National Accreditation Entity (ENAC), Brukery and AGROLAV. Among the topics discussed are; the importance of certified referential materials, the added value of accreditation as producer of referential materials, the ISO standards 11133:2014, the role of Microbial Resources Centres as suppliers of referential strains and the identification of microorganisms through MALDI- TOF MS