Dec 16, 2017 · This solution was loaded into a 2‐mL BP Plastipak™ syringe (distributed by Fisher Scientific UK Ltd, Loughborough, UK) fitted with a 0.2‐μm PTFE syringe filter (Thermo Scientific, Rockwood, TN, USA) to remove any insoluble matter and filtered into a 1‐mL HPLC total recovery vial (Waters, Elstree, UK).