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Russo G, Kajtazi A, Vallaro M, Surmont P, Ermondi G, Anderson S, Grumetto L, Caron G, Lynen F. High-throughput and reliable assessments of the ionization constant of monoprotic organic acids through an arginine based mixed mode HPLC. J Pharm Biomed Anal 2023; 235:115604. [PMID: 37531733 DOI: 10.1016/j.jpba.2023.115604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 07/19/2023] [Accepted: 07/24/2023] [Indexed: 08/04/2023]
Abstract
The charge state of a molecule is the single most prominent attribute ruling out its interactions with the surrounding environment. In a previous study, the retention of acids on the new Celeris™ Arginine (ARG) column was found to be predominantly driven by electrostatics and, specifically, their charge state. Therefore, we analysed 41 compounds in liquid chromatography with ultraviolet detection to study possible relationships between the analytical retention on this phase and the pKa of the acidic solutes. Highly significant relationships were observed indicating either a linear (r2 = 0.86) or a quadratic (r2= 0.89) trend. To improve the throughput of the method, this was transferred to LC mass spectrometry, allowing the analysis of a molecule every 3 mins. The developed method was found to be fast, reliable, accurate, easily automatable and simple to set up. Finally, the analytical column's being industrially manufactured and commercially available offers broad applicability.
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Affiliation(s)
- Giacomo Russo
- School of Applied Sciences, Sighthill Campus, Edinburgh Napier University, 9 Sighthill Ct, EH11 4BN Edinburgh, United Kingdom.
| | - Ardiana Kajtazi
- Separation Science Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4bis, B-9000 Ghent, Belgium
| | - Maura Vallaro
- CASSMedChem Research Group, Molecular Biotechnology and Health Sciences Department, University of Turin, piazza Nizza 44 bis 10126 Turin, Italy
| | - Pieter Surmont
- Separation Science Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4bis, B-9000 Ghent, Belgium
| | - Giuseppe Ermondi
- CASSMedChem Research Group, Molecular Biotechnology and Health Sciences Department, University of Turin, piazza Nizza 44 bis 10126 Turin, Italy
| | - Scott Anderson
- Regis Technologies Inc., 8210 Austin Ave, Morton Grove, IL 60053, USA
| | - Lucia Grumetto
- Department of Pharmacy, School of Medicine and Surgery, University of Naples Federico II, Via D. Montesano, 49, I-80131 Naples, Italy
| | - Giulia Caron
- CASSMedChem Research Group, Molecular Biotechnology and Health Sciences Department, University of Turin, piazza Nizza 44 bis 10126 Turin, Italy
| | - Frédéric Lynen
- Separation Science Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4bis, B-9000 Ghent, Belgium
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Voltammetric investigations of cadmium(II) complexes with glycine, di- and triglycine. ACTA ACUST UNITED AC 1989. [DOI: 10.1016/0022-0728(89)80217-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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