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Glyphosate in yam from Ghana

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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.
Keywords
Glyphosate, analysis, yam, fluorenylmethyloxycarbonyl chloride, FMOC derivatization, cleanup, LC-MS, MS, LIQUID-CHROMATOGRAPHY, AMINOMETHYLPHOSPHONIC ACID, PRECOLUMN DERIVATIZATION, WATER, GLUFOSINATE, SAMPLES

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Citation

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MLA
Wumbei, Abukari, et al. “Glyphosate in Yam from Ghana.” FOOD ADDITIVES & CONTAMINANTS PART B-SURVEILLANCE, vol. 12, no. 4, 2019, pp. 231–35, doi:10.1080/19393210.2019.1609098.
APA
Wumbei, A., Goeteyn, L., López Dávila, E., Houbraken, M., & Spanoghe, P. (2019). Glyphosate in yam from Ghana. FOOD ADDITIVES & CONTAMINANTS PART B-SURVEILLANCE, 12(4), 231–235. https://doi.org/10.1080/19393210.2019.1609098
Chicago author-date
Wumbei, Abukari, Liliane Goeteyn, Edelbis López Dávila, Michael Houbraken, and Pieter Spanoghe. 2019. “Glyphosate in Yam from Ghana.” FOOD ADDITIVES & CONTAMINANTS PART B-SURVEILLANCE 12 (4): 231–35. https://doi.org/10.1080/19393210.2019.1609098.
Chicago author-date (all authors)
Wumbei, Abukari, Liliane Goeteyn, Edelbis López Dávila, Michael Houbraken, and Pieter Spanoghe. 2019. “Glyphosate in Yam from Ghana.” FOOD ADDITIVES & CONTAMINANTS PART B-SURVEILLANCE 12 (4): 231–235. doi:10.1080/19393210.2019.1609098.
Vancouver
1.
Wumbei A, Goeteyn L, López Dávila E, Houbraken M, Spanoghe P. Glyphosate in yam from Ghana. FOOD ADDITIVES & CONTAMINANTS PART B-SURVEILLANCE. 2019;12(4):231–5.
IEEE
[1]
A. Wumbei, L. Goeteyn, E. López Dávila, M. Houbraken, and P. Spanoghe, “Glyphosate in yam from Ghana,” FOOD ADDITIVES & CONTAMINANTS PART B-SURVEILLANCE, vol. 12, no. 4, pp. 231–235, 2019.
@article{8617833,
  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.}},
  author       = {{Wumbei, Abukari and Goeteyn, Liliane and López Dávila, Edelbis and Houbraken, Michael and Spanoghe, Pieter}},
  issn         = {{1939-3210}},
  journal      = {{FOOD ADDITIVES & CONTAMINANTS PART B-SURVEILLANCE}},
  keywords     = {{Glyphosate,analysis,yam,fluorenylmethyloxycarbonyl chloride,FMOC derivatization,cleanup,LC-MS,MS,LIQUID-CHROMATOGRAPHY,AMINOMETHYLPHOSPHONIC ACID,PRECOLUMN DERIVATIZATION,WATER,GLUFOSINATE,SAMPLES}},
  language     = {{eng}},
  number       = {{4}},
  pages        = {{231--235}},
  title        = {{Glyphosate in yam from Ghana}},
  url          = {{http://dx.doi.org/10.1080/19393210.2019.1609098}},
  volume       = {{12}},
  year         = {{2019}},
}

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