Pesticide residues in herbs and their transfer for infusions

Author(s)

Caldeirao, Lucas ; Godoy, Helena Teixeira ; Fernandes, Jose ; Cunha, Sara C. C.

• Document type: Journal article
• Source: JOURNAL OF SEPARATION SCIENCE; v. 46, n. 16, p. 12-pg., 2023-06-04.

Abstract

In this work, a cost-effective gas chromatography-mass spectrometry method was validated for the analysis of twenty-five pesticide residues in herbs and infusions using a quick, easy, cheap, effective, rugged, and safe procedure or a dispersive liquid-liquid microextraction method, respectively. Figures of merit of the method showed good accordance with current guidelines. From the 58 herb samples studied (pertaining to 20 different species), 80% presented at least one detectable pesticide, with 62% of them above the maximum residual level. Results showed that pesticide residues from naturally contaminated herbs were not transferred at a significant rate to the herbal infusions. When a control assay was conducted by spiking a blank herb sample with a large amount of each pesticide (7 mg/L) 15 analytes were detected below the limit of quantification in the infusion. (AU)

• FAPESP's process: 18/25746-9 - Deep eutectic solvents in sample preparation method for determination of contaminants in ready-to-drink teas
• Grantee: Lucas Caldeirão Rodrigues Miranda
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• FAPESP's process: 17/11635-8 - Residues and contaminants in baby food and baby bottles: development and validation of analytical methods
• Grantee: Helena Teixeira Godoy
• Support Opportunities: Regular Research Grants
• FAPESP's process: 17/05048-2 - Plants tadiotionally used for infusion: Sample preparation techniques and determination of contaminants.
• Grantee: Lucas Caldeirão Rodrigues Miranda
• Support Opportunities: Scholarships in Brazil - Doctorate