Determination of pesticides in sugarcane juice employing microextraction by packed sorbent followed by gas chromatography and mass spectrometry

Author(s)

Fumes, Bruno Henrique ; Andrade, Felipe Nascimento ; dos Santos Neto, Alvaro Jose ; Lancas, Fernando Mauro

• Document type: Journal article
• Source: JOURNAL OF SEPARATION SCIENCE; v. 39, n. 14, p. 2823-2830, JUL 2016.
• Web of Science Citations: 10

Abstract

This paper describes the development of a method for the determination of six pesticides (tebuthiuron, carbofuran, atrazine, metribuzine, ametryn, and bifenthrin) in sugarcane juice using microextraction by packed sorbent as the extraction technique. The extraction steps were optimized by factorial design, being the variables pH, ionic strength, desorption solvent and solvent volume optimized for comparisons among sorbent materials. Among the evaluated materials C18-Chromabond (R) showed better extraction efficiency. A factorial design 23 with central point was used for the extraction cycles optimization Draw/eject and washes cycles showed significant improvements in the extraction efficiency when the number of cycles increased. The method was validated and showed a limit of quantification in the range of 2.0-10.0 mu g.L-1. The calibration curves were constructed by weighting models that reduced the sum of absolute residues values and improved determination coefficient. The matrix factor and extraction efficiency were 97.3-77.3% and 27.1-64.8%, respectively. The accuracy was 71.7-106.9%; precision evaluated as the coefficient of variance obtained in intra and inter day analysis was 4.5-15.9%. The method was applied to the determination of pesticide residues in four sugarcane juice samples commercially available in markets from different cities from Sao Paulo state, Brazil. (AU)

• FAPESP's process: 11/09898-4 - Development of molecularly imprinted polymer and use for the sample preparation and analysis of triazine and sulfonylurea in maize using high performance liquid chromatography (HPLC).
• Grantee: Felipe Nascimento Andrade
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 10/19910-9 - Development of green chemistry strategies on chromatography and application to the evaluation of antibiotics degradation in wastewaters by fixed-bed anaerobic bioreactors
• Grantee: Alvaro José dos Santos Neto
• Support Opportunities: Regular Research Grants
• FAPESP's process: 14/07347-9 - Development of novel materials and devices for miniaturized sample preparation techniques in the area of food safety
• Grantee: Fernando Mauro Lanças
• Support Opportunities: Regular Research Grants
• FAPESP's process: 13/17425-4 - Evaluation of MEPS technique applied in pesticides analysis in sugarcane juice by GC-MS
• Grantee: Bruno Henrique Fumes
• Support Opportunities: Scholarships in Brazil - Master