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From waste to health: Application of MOF modified walnut biochars for the determination of twenty pesticides in wheat flour by ultra-high performance liquid chromatography-tandem mass spectrometry

Behbahan, A. K ; Sharif University of Technology | 2023

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  1. Type of Document: Article
  2. DOI: 10.1016/j.foodchem.2022.134881
  3. Publisher: Elsevier Ltd , 2023
  4. Abstract:
  5. In this research, walnut shell along with a Ni-metal organic framework (Ni-MOF) was thermally treated to obtain a highly efficient biochar. A µ-solid phase extraction (µ-SPE) setup containing the optimized walnut modified biochar was implemented for the extraction of 20 wheat specified pesticides with a wide range of polarities. The modified biochars were characterized and the role of Ni-MOF on the porosity of the obtained biochars was investigated. After optimizing the extraction parameters, the 50 %-Ni-MOF-walnut shell biochar was selected. Accordingly, the precision for intra-day (2.4–25 %), inter-day (7–28.3 %) and synthesis procedure (4.1–26.7 %) was calculated. The limits of detection and quantification were in the range of 0.01–12.1 µg/L and 0.03–40.5 µg/L, respectively. This method was applied for the analysis of 29 wheat samples. The risk assessment study demonstrates that the contaminated wheat samples cannot cause non-carcinogenic harm to adults but might have an impact on children. © 2022 Elsevier Ltd
  6. Keywords:
  7. Biochars ; Pesticides ; UHPLC-MS/MS ; Walnut shell ; Wheat sample ; µ-Solid phase extraction
  8. Source: Food Chemistry ; Volume 405 , 2023 ; 03088146 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0308814622028436