Recertification of SRM 706a, a Polystyrene

Published

January 1, 1998

Author(s)

Kathleen M. Flynn, William R. Blair, J R. Maurey

Abstract

The recertification of the polystyrene standard reference material, SRM 706a, is described. The Mw of SRM 706a by light scattering was determined to be 2.85 x 10⁵ g/mol with a sample standard deviation of 0.019 x 10⁵ g/mol. A combined expanded uncertainty of 0.17 x 10⁵ g/mol is estimated for this determination. The M_w obtained for on SRM 706 recently run. The M_w obtained for SRM 706a is also in excellent agreement with the M_w obtained by ultracentrifugation in 1967 of 2.88 x 10⁵ g/mol on SRM 706. No bottle-to-bottle variability was found for SRM 706a in a size exclusion chromatography study.

Citation

NIST Interagency/Internal Report (NISTIR) - 6091

Report Number

6091

NIST Pub Series

NIST Interagency/Internal Report (NISTIR)

Pub Type

NIST Pubs

Keywords

average molecular weight, molecular weight standard, polystyrene standard, SRM 706, SRM 706a, Standard Reference Material, weight

Citation

Flynn, K. , Blair, W. and Maurey, J. (1998), Recertification of SRM 706a, a Polystyrene, NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD (Accessed October 17, 2025)