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Glyphosate in yam from Ghana.

Authors
  • Wumbei, Abukari1, 2
  • Goeteyn, Liliane1
  • Lopez, Edelbis1, 3
  • Houbraken, Michael1
  • Spanoghe, Pieter1
  • 1 Faculty of Bioscience Engineering, Department of Crop Protection Chemistry, Ghent University, Ghent, Belgium. , (Belgium)
  • 2 Institute for Interdisciplinary Research and Consultancy Services, University for Development Studies, Tamale, Ghana. , (Ghana)
  • 3 Department of Crop Protection, Sancti Spiritus University, Sancti Spiritus, Cuba. , (Cuba)
Type
Published Article
Journal
Food additives & contaminants. Part B, Surveillance
Publication Date
Dec 01, 2019
Volume
12
Issue
4
Pages
231–235
Identifiers
DOI: 10.1080/19393210.2019.1609098
PMID: 31046629
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Glyphosate is used in Ghana on many crops including yam. There is the suspicion that there could be residue problems in the yam crop. Glyphosate as a polar compound is noted for its difficulty to be analysed in biological matrices. In this study, the method for glyphosate analysis based on FMOC-Cl derivatization was modified with a clean-up (CH2Cl2) step and validated to analyse glyphosate in yam by LC-MS/MS. The results showed that the validated method was efficient for the analysis of glyphosate in yam, with recoveries of 34%, linearity of 0.997, RSD of 7%, LOD of 0.04 mg kg-1, and LOQ of 0.12 mg kg-1. Out of 68 samples analysed from a field experiment and from markets, glyphosate was detected in 14 samples, but at levels below the LOQ. It is concluded that the yam contained glyphosate residues at very low levels which may not pose threat to human health.

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