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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Development and validation of an analytical method for multiresidue determination of pesticides in lettuce using QuEChERS-UHPLC-MS/MS

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Author(s):
Begnini Konatu, Fernanda Ribeiro [1] ; Sales Fontes Jardim, Isabel Cristina [1]
Total Authors: 2
Affiliation:
[1] Univ Estadual Campinas, Inst Quim, Caixa Postal 6154, BR-13084971 Campinas, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: JOURNAL OF SEPARATION SCIENCE; v. 41, n. 8, p. 1726-1733, APR 2018.
Web of Science Citations: 13
Abstract

A new analytical method for multiresidue determination of 16 multiclass pesticides in lettuce was developed using ultra-high performance liquid chromatography with tandem mass spectrometry with a triple quadrupole mass analyzer and positive mode electrospray ionization, using a previously optimized quick, easy, cheap, effective, rugged, and safe method for sample preparation. Validation studies, according to document SANTE/11945/2015, demonstrated that the developed method is selective, accurate, and precise, providing recoveries of 70-120%, relative standard deviations <= 20% and quantification limits from 3 mu g/kg. The method was compared with one based on high-performance liquid chromatography with tandem mass spectrometry, in terms of chromatographic performance, detectability and matrix effect for five varieties of lettuce. The new method provided a reduction in the time for the chromatographic analysis of 50%, from 30 to 15 min, using a lower mobile phase flow rate (0.147 mL/min), which reduced the consumption of mobile phase by 25%, and injection of smaller amounts of sample (1.7 mu L). Lower limits of quantification were obtained for almost all pesticides studied for green-leaf lettuce. However, in relation to the matrix effect, four of the five types of lettuce studied presented higher matrix effects. (AU)

FAPESP's process: 11/23127-0 - Development and validation of analytical methods for the determination of multiresidues of pesticides in lettuce, using ultra-performance liquid chromatography and liquid chromatography coupled with tandem mass spectrometry.
Grantee:Fernanda Ribeiro Begnini
Support Opportunities: Scholarships in Brazil - Doctorate