Preparation, characterization, and applications of chitosan-graphene oxide hybrid sorbents in automated microextraction by packed sorbent (MEPS): evaluation of residues and contaminants in food matrices

• Grant number: 23/15675-5
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: April 01, 2024
• End date: March 31, 2026
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Analytical Chemistry
• Principal Investigator: Fernando Mauro Lanças
• Grantee: Rafael Oliveira Martins
• Host Institution: Instituto de Química de São Carlos (IQSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
• Associated scholarship(s): 25/04248-4 - Developing and applying graphene-based biosorbents in vacuum-assisted headspace thin-film microextraction (Vac-HS-TFME) for contaminants assessment in food matrices, BE.EP.PD

Abstract

In the last century, global demand for food has led to the widespread use of chemicals to increase production and meet global food needs. However, due to the adverse effects these compounds can have on human health, the development of analytical methodologies capable of assessing the presence of chemical residues in food has become a global urgency. Miniaturized methodologies such as Microextraction by Packed Sorbent (MEPS) have been applied in the evaluation of different biological matrices, holding untapped potential in food analysis. Furthermore, many MEPS methods still use classical systems based on offline methodologies. Therefore, the application of MEPS in its online version can provide a new perspective for analyzing residues in challenging matrices, such as food. The development of new sorbents is also an international trend, with graphene-based materials, especially graphene oxide, showing significant unexplored potential, especially regarding their modification and application in food analysis. In this context, the modification of graphene oxide with chitosan creates a sorbent with various functional groups, allowing multiple interactions with different classes of analytes. Despite its promise, its use in food analysis is still under-documented. Thus, the project aims to develop, characterize, and employ chitosan-graphene oxide-based sorbents in new devices for the MEPS technique. The commercially available system does not allow the replacement of commercial sorbents with new materials. These sorbents will be used in the development, validation, and application of new online MEPS-LC-MS/MS methods for the determination of residues and contaminants in food samples. (AU)

Scientific publications

(4)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

MARTINS, RAFAEL O.; LANCAS, FERNANDO M.. Microextraction by packed sorbent: Introducing a novel hybrid silica-based chitosan-graphene oxide biosorbent for the evaluation of pesticides and antibiotics in food matrices. ADVANCES IN SAMPLE PREPARATION, v. 12, p. 12-pg., 2024-10-01. (17/21984-0, 23/07159-7, 23/15675-5, 17/21985-6, 17/02147-0)

MARTINS, RAFAEL OLIVEIRA; BORSATTO, JOAO VICTOR BASOLLI; WILL, CAMILA; LANCAS, FERNANDO MAURO. Advancements in Microextraction by Packed Sorbent: Insights into Sorbent Phases and Automation Strategies. SEPARATIONS, v. 12, n. 1, p. 30-pg., 2025-01-01. (23/15675-5, 23/07159-7)

MARTINS, RAFAEL OLIVEIRA; CARDOSO, ALESSANDRA TIMOTEO; BORSATTO, JOAO VICTOR; LANCAS, FERNANDO MAURO. Advances in green carbon-based biosorbents: From conventional to miniaturized sample preparation strategies. Talanta, v. 283, p. 19-pg., 2025-02-01. (23/07159-7, 23/15675-5, 23/06258-1)

CARDOSO, ALESSANDRA TIMOTEO; MARTINS, RAFAEL OLIVEIRA; LANCAS, FERNANDO MAURO. Advances and Applications of Hybrid Graphene-Based Materials as Sorbents for Solid Phase Microextraction Techniques. Molecules, v. 29, n. 15, p. 28-pg., 2024-08-01. (23/07159-7, 23/15675-5, 23/06258-1)