Academic Journal

Novel Strongly Basic Molecularly Imprinted Solid-Phase Extraction Sorbent for Simultaneous Determination of Catecholamines and Their Metabolites in Urine.

Λεπτομέρειες βιβλιογραφικής εγγραφής
Τίτλος: Novel Strongly Basic Molecularly Imprinted Solid-Phase Extraction Sorbent for Simultaneous Determination of Catecholamines and Their Metabolites in Urine.
Συγγραφείς: Šilaks A; Faculty of Medicine and Life Sciences, University of Latvia, Riga, Latvia., Podjava A; Faculty of Medicine and Life Sciences, University of Latvia, Riga, Latvia., Bernāte L; Faculty of Medicine and Life Sciences, University of Latvia, Riga, Latvia., Grebnevs V; Faculty of Medicine and Life Sciences, University of Latvia, Riga, Latvia.; Faculty of Chemistry, Silesian University of Technology, Gliwice, Poland., Maciej A; Faculty of Chemistry, Silesian University of Technology, Gliwice, Poland.
Πηγή: Journal of separation science [J Sep Sci] 2026 Jun; Vol. 49 (6), pp. e70467.
Τύπος έκδοσης: Journal Article
Γλώσσα: English
Στοιχεία περιοδικού: Publisher: Wiley-VCH Country of Publication: Germany NLM ID: 101088554 Publication Model: Print Cited Medium: Internet ISSN: 1615-9314 (Electronic) Linking ISSN: 16159306 NLM ISO Abbreviation: J Sep Sci Subsets: MEDLINE
Imprint Name(s): Original Publication: Weinheim, Germany : Wiley-VCH, c2001-
Ιατρικοί όροι (MeSH): Solid Phase Extraction*/instrumentation , Solid Phase Extraction*/methods , Catecholamines*/urine , Catecholamines*/metabolism , Catecholamines*/isolation & purification , Molecularly Imprinted Polymers*/chemistry , Molecularly Imprinted Polymers*/chemical synthesis , Molecular Imprinting*, Polymers/chemistry ; Polymers/chemical synthesis ; Humans ; Adsorption ; Chromatography, High Pressure Liquid
Περίληψη: Catecholamines are important hormones and neuromediators in the human body. Simultaneous determination of both catecholamines and catecholamine metabolites in bodily fluids can help accurately diagnose dangerous health conditions like adrenal tumors. However, the biggest obstacle is the selective separation of these compounds from the biological matrix. In this work, we propose a novel, dual-recognition, non-covalent molecularly-imprinted polymer that utilizes strong anion exchange as the source of sorbent-analyte interaction. (4-Vinylbenzyl)trimethylammonium-homovanillyl alcohol anion salt and (4-vinylbenzyl)trimethylammonium-homoveratric acid anion salt served as template/functional monomer complexes for catecholamines and acidic metabolites, respectively. The sorbent was synthesized using precipitation polymerization and studied with batch adsorption experiments, scanning electron microscopy, Fourier-transform infrared spectroscopy, and Brunauer-Emmett-Teller surface area and pore size analysis. The polymer was loaded into cartridges and tested with acidified urine samples. The analytes are deprotonated and adsorbed via sorbent's tetraalkylammonium moiety in hydroxide form, which also neutralizes excess acid, removing the need for pH readjustment (which is often necessary for urine analysis). The imprinted sorbent can also be reused at least four times without performance deterioration. Norepinephrine, epinephrine, dopamine, normetanephrine, metanephrine, vanillylmandelic acid, and homovanillic acid were separated and analyzed in a single run using molecularly imprinted solid-phase extraction combined with liquid chromatography-tandem mass spectrometry (MISPE-LC-MS/MS), with recoveries ranging from 69% (epinephrine) to 97% (homovanillic acid). Method's limits of detection, limits of quantitation, linearity, repeatability, trueness, and intermediate precision were evaluated. Limits of quantitation ranged from 0.7 to 6.5 µg/L (for catecholamines and metanephrines) and from 0.12 to 0.2 mg/L (for acidic metabolites). Compared to commercially available weak-cation exchange and hydrophilic-lipophilic balance cartridges, the imprinted sorbent produced stronger catecholamine signals with minimal volume of urine (25 µL). This study successfully demonstrated molecularly imprinted solid-phase extraction workflow for simultaneous separation and quantitation of urinary catecholamines and their basic and acidic metabolites, proving its compatibility with bioanalysis.
(© 2026 The Author(s). Journal of Separation Science published by Wiley‐VCH GmbH.)
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Grant Information: lzp-2022/1-0141 Fundamental and Applied Research Project (Latvian Scientific Council)
Contributed Indexing: Keywords: catecholamines; molecularly‐imprinted polymers; non‐covalent imprinting; solid‐phase extraction; strong anion exchange
Substance Nomenclature: 0 (Catecholamines)
0 (Molecularly Imprinted Polymers)
0 (Polymers)
Entry Date(s): Date Created: 20260615 Date Completed: 20260615 Latest Revision: 20260726
Update Code: 20260726
PubMed Central ID: PMC13266282
DOI: 10.1002/jssc.70467
PMID: 42290105
Βάση Δεδομένων: MEDLINE