Pesticide analysis in coffee leaves using a quick, easy, cheap, effective, rugged and safe approach and liquid chromatography tandem mass spectrometry: optimization of the clean-up step
An analytical method using a quick, easy, cheap, effective, rugged and safe (QuEChERS) procedure for multi-residue determination of 52 pesticides in coffee leaf extractshas been developed and validated according to SANTE/11945/2015 guidelines. Different sorbent combinations for dispersive solid phas...
Gespeichert in:
| Hauptverfasser: | , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
2017
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| In: |
Journal of chromatography
Year: 2017, Jahrgang: 1512, Pages: 98-106 |
| ISSN: | 1873-3778 |
| DOI: | 10.1016/j.chroma.2017.07.033 |
| Online-Zugang: | Verlag, Volltext: http://dx.doi.org/10.1016/j.chroma.2017.07.033 Verlag, Volltext: http://www.sciencedirect.com/science/article/pii/S0021967317310166 
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| Verfasserangaben: | Maria Teresa Salles Trevisan, Robert Wyn Owen, Pau Calatayud-Vernich, Andrea Breuer, Yolanda Picó |
MARC
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| 245 | 1 | 0 | |a Pesticide analysis in coffee leaves using a quick, easy, cheap, effective, rugged and safe approach and liquid chromatography tandem mass spectrometry |b optimization of the clean-up step |c Maria Teresa Salles Trevisan, Robert Wyn Owen, Pau Calatayud-Vernich, Andrea Breuer, Yolanda Picó |
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| 520 | |a An analytical method using a quick, easy, cheap, effective, rugged and safe (QuEChERS) procedure for multi-residue determination of 52 pesticides in coffee leaf extractshas been developed and validated according to SANTE/11945/2015 guidelines. Different sorbent combinations for dispersive solid phase extraction (d-SPE) clean-up as well as dispersive liquid-liquid microextraction (DLLME) were tested. The relative standard deviations (RSDs) for the recovery of 87-94% of pesticides added to coffee leaf extracts,was ≤20% for samples spiked at concentrations up to 50ng*g−1 depending on the clean-up procedures. However, samples spiked with a 100ng*g−1 pesticide mixture gave RSDs>20% for most pesticides when d-SPE was carried out adding Supelclean ENVI-Carb 120/400. To explain this fact,the secondary metabolic profile was analyzed in all the extraction and clean-up procedures. Only in the clean-up procedure with the addition of Supel QuE Z-Sep+, does caffeine show a constant adsorption between blank and spiked samples. In other clean-up procedures, the amount of caffeine was higher in those samples spiked with pesticides. This indicates competition between caffeine and pesticides for adsorption to the sorbent. Addition of Supel QuE Z-Sep+ to the procedure revealed only a 32% matrix effect, whereas using PSA+ C18 the matrix effect was close to 97%. The process efficiency is up to 54% with the addition of Supel QuE Z-Sep+ and just up to 7% for the other clean-up procedures. The method was successfully tested in coffee leaves from different types of cultivars. Pesticides were not detected in organic coffee leaf extracts, but thiametoxan was clearly detected in 50% of coffee leaf extracts harvested from coffee trees grown under traditional conditions as determined by UHPLC-TOFMSLC/QqTOF-MS/MS. | ||
| 650 | 4 | |a Coffee leaves | |
| 650 | 4 | |a Dispersive solid-phase clean-up | |
| 650 | 4 | |a Liquid chromatography-mass spectrometry | |
| 650 | 4 | |a Matrix co-extractives | |
| 650 | 4 | |a Pesticides | |
| 650 | 4 | |a QuEChERS | |
| 700 | 1 | |a Owen, Robert |e VerfasserIn |0 (DE-588)1082251887 |0 (DE-627)847252019 |0 (DE-576)455284539 |4 aut | |
| 700 | 1 | |a Breuer, Andrea |e VerfasserIn |0 (DE-588)1161560505 |0 (DE-627)102484448X |0 (DE-576)506731545 |4 aut | |
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