Milli q direct 8 millipore system

R- and S-APR were purchased from Beijing Mesochem Technology Co. Ltd. (Beijing, China). Human serum albumin was ordered from Tokyo Chemical Industry Co. Ltd. (Tokyo, Japan). Methanol (MeOH), ethanol (EtOH), 1-propanol (PROP), 2-propanol (IPA) and acetonitrile (ACN) of gradient grade were purchased from Merck (Darmstadt, Germany). The immobilized Chiral-HSA column (4.0 × 100 mm, 5 μm) was ordered from Chiral Technologies Inc., a subsidiary of Daicel Chemical Industries Ltd. (Tokyo, Japan). Analytical-grade acetic acid, phosphate salts, phosphoric acid, sodium hydroxide and ammonium–acetate were ordered from Sigma-Aldrich, Hungary (Budapest, Hungary). These were used for the preparation of the buffer solution. All reagents were used without further purification. The deionized water was prepared by a Milli-Q Direct 8 Millipore system (Millipore Corporation, Bedford, MA, USA).

Seleno-l-cystine, oxidized glutathione, sarcosine and tert-butylamine were obtained from Sigma Aldrich, dithiothreitol was obtained from Tokyo Chemical Industry, selenocystamine dihydrochloride was purchased from AKos GmbH. Deuterium oxide (D₂O) and methanol were purchased from Merck. All reagents were of analytical grade and used without further purification. The deionized water was prepared with a Milli-Q Direct 8 Millipore system.

POM was obtained from Beijing Mesochem Technology Co. Ltd. (Beijing, China). D₂O, DMSO-d₆ and DMSO were ordered from Sigma-Aldrich Hungary (Budapest, Hungary). All native CDs (α-, β- and γ-CD) and their derivatives (hydroxypropyl-β-CD (HP-β-CD) with different degrees of substitution (DS) 3, 4.5, 6; randomly methylated-β-CD DS~12 (RAMEB), permethylated-β-CD (TRIMEB), sulfobutylether-β-CD DS~7 (SBE-β-CD)) were the products of Cyclolab R&D Ltd. (Budapest, Hungary). All other chemicals used were of analytical grade from commercial suppliers. Ultrapure, deionized water was prepared by a Milli-Q Direct 8 Millipore system (Milford, MA, USA).