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Original Articles

Assessing the suitability of a green solvent for gel permeation chromatography–mass spectrometry analysis

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Pages 305-309 | Received 12 Dec 2016, Accepted 26 Jan 2017, Published online: 28 Mar 2017
 

ABSTRACT

The study presents the possibility of performing the analysis of oligomeric structures and polymer additives by gel permeation chromatography (GPC) with atmospheric pressure chemical ionization (APCI) mass spectrometry (MS) in dibuthoxymethane (DBM, butylal), a halogen-free and less hazardous solvent than typically used chloroform and tetrahydrofuran. Polystyrene oligomers and Irganox® additives were analyzed in DBM using 2.1 mm internal diameter GPC columns, allowing to decrease the flow rate down to 50 µL/min, compatible with APCI–MS interface. The ionization was controlled by adding 1% chloroform in DBM to obtain (M+Cl) adducts, allowing a fast optimization of method parameters.

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