The Chemical Sciences Division is involved in development of standards and reference materials for restricted hazardous substances through participation in international test method development programs, by providing existing Standard Reference Materials (SRMs) for test method validation, and by investing in development of new SRMs.
Chemical Sciences Division involvement with RoHS is based in large measure on feedback obtained during a NIST workshop in October 2005, which resulted in a prioritized list of materials for new SRMs. Current projects include production of SRMs for lead-free solder and free-cutting brass containing high levels of restricted substances. Collaborations are underway with the National Institute of Metrology of China (NIM-C) and the Institute for Reference Materials and Measurements (IRMM) of the European Union (EU).
This project is intended to create tools for metrologically sound sampling, analysis, and testing of consumer products, their raw materials, and intermediates for the purpose of compliance with worldwide regulations governing contents of hazardous and declarable substances including hexavalent chromium, cadmium, mercury, lead, polybrominated biphenyls (PBB), and polybrominated diphenylether (PBDE) compounds in electronic and electrical products. Activities are designed to enable direct involvement of NIST experts in standards development processes to help international organizations to develop valid standard test methods. Additional activities are aimed at assisting manufacturers and consumers with analyses to obtain accurate, defensible results.
This project is comprised of a number of collaborations between NIST and industry representatives: design of materials for new SRMs is accomplished in cooperation with materials and analysis experts from industry, and specifications for composition, homogeneity, and quantity are based on current and projected industry needs and current regulatory requirements. Value assignment projects are designed to include high-performance analytical methods at NIST and state-of-the-art laboratory methods in industry.
SRM 2855 Additive Elements in Polyethylene - values assigned for Na, Si, P, S, Ca, Zn, and restricted elements (Ti, Cr, Br, Cd, Hg, Pb)
The following industry standard methods of test were developed and approved with significant contributions by NIST: