Abstract
A method for the simultaneous determination of saturated and unsaturated oligogalacturonic acids up to degree of polymerization (dp) of 7 by high-performance liquid chromatography (HPLC) is presented. For this purpose, a Cyclobond I 2000 column and a volatile mobile phase consisting of ammonium formate and methanol were used, allowing direct coupling of HPLC to a mass spectrometer via an electrospray interface (ESI-MS) without additional desalting. The analytical system was used for the characterization of digests obtained by incubation of polygalacturonic acid with commercial enzyme preparations.
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