PERM project

ID-TIMS has frequently been used for certification of Standard Reference Materials by NIST (ex NBS) and IRMM (ex BCR), as in case of the Polymer Elemental Reference Material (PERM) project for the production of PE standards with certified concentrations of eight elements, namely Cd, Cr, Hg, Pb, As, S, Cl and Br [1], Also certification of the VDA-001 to -004 PE/Cd CRMs has taken advantage of both ID-TIMS [224,425] and... 

In the field of RM certification, NAA represents a major analytical technique. It possesses unique quality assurance and self-verification aspects. Not surprisingly, therefore, NAA has been used to certify NIST standard reference materials [470]. By analogy, NAA has also been instrumental in analysing the EC polymer reference materials within the framework of the PERM project [1]. NAA was also used to validate a TXRF procedure for the determination of additives containing Ti, Zn, Br, Cd, Sn, Sb and Pb [56],... 

Quality assurance considerations lead to the need for appropriate reference materials, and their consistent and effective use to monitor the precision and accuracy of laboratory analyses. In this context, certified reference materials (CRMs), now still largely lacking in the polymer/additive area, play an important role. In previous years, some attempts have been undertaken to prepare some inorganic CRMs (VDA and PERM projects), but this is highly insufficient when we consider that some 60 elements are used in polymer/additive formulations. The lack of CRMs for organic compounds in polymeric matrices is an even more serious handicap. Nagoumey and Madan [122] have demonstrated that intermediate or finished in-house materials can be utilised successfully as QA reference materials. Good QC of polymer/additive formulations as yet has not been achieved. 

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