Liquid chromatography–electrospray ionisation mass spectrometry (LC-ESI-MS) was used to analyse the molecular weights of the peak fractions of EEAS. These were separated using a Kinetex F5 LC column (150 × 4.6 mm; 5 µm) (Phenomenex, UK) with UV detection at 220–256 nm on a Spectra System LC (Thermo Separation Products) as previously reported [30 (link)].
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