A1 Refereed original research article in a scientific journal
Simple nanoparticle-based luminometric method for molecular weight determination of polymeric compounds
Authors: Sari Pihlasalo, Maria Virtamo, Nicolas Legrand, Pekka Hänninen, Harri Härmä
Publisher: American Chemical Society
Publication year: 2014
Journal: Analytical Chemistry
Journal name in source: Analytical chemistry
Journal acronym: Anal Chem
Volume: 86
Issue: 2
First page : 1038
Last page: 1044
Number of pages: 7
ISSN: 1520-6882
eISSN: 1520-6882
DOI: https://doi.org/10.1021/ac401797m
Abstract
A nanoparticle-based method utilizing time-resolved luminescence resonance energy transfer (TR-LRET) was developed for molecular weight determination. This mix-and-measure nanoparticle method is based on the competitive adsorption between the analyte and the acceptor-labeled protein to donor Eu(III) nanoparticles. The size-dependent adsorption of molecules enables the molecular weight determination of differently sized polymeric compounds down to a concentration level of micrograms per liter. The molecular weight determination from 1 to 10 kDa for polyamino acids and from 0.3 to 70 kDa for polyethylene imines is demonstrated. The simple and cost-effective nanoparticle method as microtiter plate assay format shows great potential for the detection of the changes in molecular weight or for quantification of differently sized molecules in biochemical laboratories and in industrial polymeric processes.
A nanoparticle-based method utilizing time-resolved luminescence resonance energy transfer (TR-LRET) was developed for molecular weight determination. This mix-and-measure nanoparticle method is based on the competitive adsorption between the analyte and the acceptor-labeled protein to donor Eu(III) nanoparticles. The size-dependent adsorption of molecules enables the molecular weight determination of differently sized polymeric compounds down to a concentration level of micrograms per liter. The molecular weight determination from 1 to 10 kDa for polyamino acids and from 0.3 to 70 kDa for polyethylene imines is demonstrated. The simple and cost-effective nanoparticle method as microtiter plate assay format shows great potential for the detection of the changes in molecular weight or for quantification of differently sized molecules in biochemical laboratories and in industrial polymeric processes.
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