The characterisation of shellac resin by flow injection and liquid chromatography coupled with electrospray ionisation and mass spectrometry.

ABSTRACT: A strategy based on electrospray ionisation (ESI) in negative mode coupled with quadrupole-time of flight (Q-ToF) detection techniques was adopted to characterise some samples of shellac resin. Flow injection analysis (FIA) was used to investigate the distribution of the components of the resin. Eight groups of compounds with increasing masses were detected and assigned to free acids, esters and polyesters with up to eight units. High pressure liquid chromatography (HPLC) enabled the compounds to be chromatographically separated. Accurate molecular masses and tandem mass (MS/MS) spectra interpretation were used to characterise the different compounds, assigning and/or suggesting molecular structures. In some cases, highly detailed information about the ester linkages was provided by the MS

SUBMITTER: Tamburini D 

PROVIDER: S-EPMC5665916 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature