Matrix-assisted laser desorption/ionization time of flight mass spectrometry (MALDI-TOF-MS) is becoming a new and important technique in synthetic polymer characterization. Yet much is still unknown about the molecular mass distribution (MWD) which is obtained through the MALDI process. An interlaboratory comparison was conducted by NIST to compile data and learn more about the MWD obtained and the parameters that influence this distribution. Each lab was asked to use two different sample preparations, one of which was specified, and to report three repeats for each preparation. This paper describes data analysis techniques and the results from sixteen labs analyzing a polystyrene sample of nominal molecular mass 7000 u.
Citation: Analytical Chemistry
Issue: No. 6
Pub Type: Journals
data analysis, molecular weight distribution, polymer