The certification of the absolute molecular mass distribution (MMD)
of an n-octyl-initiated, proton-terminated, low mass, atactic
polystyrene (PS) by matrix-assisted laser desorption ionization
time-of-flight mass spectrometry (MALDI-TOF MS) is fully described.
This polymer has been designated Standard Reference Material (SRM)
2881. The material constituting SRM 2881 was prepared commercially
for the NIST Polymers Division specifically for use as a
narrow-distribution polymer standard. Anticipated uses include
calibration of mass spectrometers and size exclusion chromatographs
(SEC) in accordance with various international standards (described
below), as well as any other application where quantitative
knowledge of the entire MMD is necessary. The work described here,
and in related references, provides a means to create absolute
molecular mass distribution standards of any low mass, narrow
polydispersity polymer including proprietary materials.
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