A magnetic stir bar sorbent of metal organic frameworks, carbon foam decorated zinc oxide and cryogel to enrich and extract parabens and bisphenols from food samples

• Published in: Journal of chromatography. B, Analytical technologies in the biomedical and life sciences Analytical technologies in the biomedical and life sciences, 2024-01, Vol.1232, p.123970-123970, Article 123970
• Main Authors: Jullakan, Sirintorn, Rattanakunsong, Natnaree, Płotka-Wasylka, Justyna, Bunkoed, Opas
• Format: Article
• Language: English
• Subjects: Benzhydryl Compounds; Carbon; Carbon foam; Cryogels; Extraction; Limit of Detection; Magnetic Phenomena; Metal organic frameworks; Metal-Organic Frameworks - chemistry; Parabens; Phenols; Stir bar adsorbent; Zinc Oxide
• ISSN: 1570-0232; 1873-376X
• DOI: 10.1016/j.jchromb.2023.123970

•A composite stir bar sorbent extracted parabens and bisphenols simultaneously.•The composite comprised MOF-5, carbon foam decorated zinc oxide and PVA cryogel.•The sorbent achieved extraction recoveries ranging from 89.5 to 99.5 %.•The developed sorbent could be reused up to eleven times. A porous composite magnetic stir bar adsorbent was fabricated for the extraction and enrichment of parabens and bisphenols from selected beverage samples. The adsorbent comprised a metal organic framework, carbon foam decorated zinc oxide and magnetic nanoparticles embedded in polyvinyl alcohol cryogel. The porous composite stir bar adsorbent could adsorb parabens and bisphenols via hydrogen bonding, π-π and hydrophobic interactions. In the best conditions, linearity was good from 5.0 to 200.0 µg/L for methyl paraben, ethyl paraben and bisphenol A and from 10.0 to 200.0 µg/L for bisphenol B and butyl paraben. Limits of detection ranged from 1.5 to 3.0 µg/L. The developed composite stir bar was successfully applied to extract and determine parabens and bisphenols in fruit juice, beer and milk. Recoveries ranged from 89.5 to 99.5 % with RSDs lower than 6 %. The developed sorbent and new methodology were evaluated in terms of its green character with satisfactory results.