Abstract
For the first time, a comprehensive analytical method based on a one-dimensional metal–organic framework comprising “quick, easy, cheap, effective, rugged, and safe-dispersive micro solid phase extraction-dispersive liquid–liquid microextraction” was introduced in this research. Moreover, the first-ever attempt was accomplished to apply the iron–gallic acid metal–organic framework in analytical method development. The goal of the research was to analyze the pesticide content of watermelon comprehensively in its flesh and juice. Based on this, comprehensive and reliable food safety monitoring can be done. Initially, pesticides of the watermelon flesh were extracted using an mL volume of acetonitrile by vortexing. At the same time, the pesticides of watermelon juice were extracted from the juice matrix onto the sorbent particles facilitated by vortexing. The obtained acetonitrile phase was also used to desorb the analytes from the sorbent surface by vortexing. As a result, the pesticide content of both juice and flesh was extracted into the acetonitrile. The pesticide-enriched acetonitrile was then used as the disperser solvent by being merged with µL level of 1,2-dibromoethane and injection into deionized water. A cloudy solution was created as the result. Centrifugation triggered extractant at the bottom of the conical glass test tube and an aliquot of it was injected into a gas chromatograph equipped with a flame ionization detector. High enrichment factors (210–400), appreciable extraction recoveries (42–80%), wide linear ranges (3.20–1000 µg kg−1), relative standard deviations in the ranges of 3.6–4.4% for intra- (n = 6) and 4.4–5.3% for inter-day (n = 3) precisions, and low limits of detection (0.43–0.97 µg kg−1), and quantification (1.42–3.20 µg kg−1) were obtained by the application of the developed method.
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Data availability
All data generated or analyzed during this study are included in this published article.
Abbreviations
- FeGA MOF:
-
Iron–gallic acid metal–organic framework
- DLLME:
-
Dispersive liquid–liquid microextraction
- DµSPE:
-
Dispersive micro-solid-phase extraction
- EF:
-
Enrichment factor
- ER:
-
Extraction recovery
- FID:
-
Flame ionization detector
- GC:
-
Gas chromatography
- LOD:
-
Limit of detection
- LOQ:
-
Limit of quantification
- LR:
-
Linear range
- QuEChERS:
-
Quick, easy, cheap, effective, rugged, and safe
- RSD:
-
Relative standard deviation
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Acknowledgements
The authors are thankful to the University of Tabriz for the financial support.
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SP: MOF synthesis and characterization, analytical methodology, analytical analysis, and writing the manuscript. MAF: analytical methodology and editing the manuscript. SAH-Y: synthesis methodology. MRAM: analytical methodology.
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Pezhhanfar, S., Farajzadeh, M.A., Hosseini-Yazdi, S.A. et al. An all-embracing analytical method comprising modified QuEChERS-dispersive micro-solid-phase extraction–dispersive liquid–liquid microextraction using FeGA MOF for the extraction and preconcentration of pesticides simultaneously from juice and flesh of watermelon. ANAL. SCI. 39, 1201–1214 (2023). https://doi.org/10.1007/s44211-023-00330-8
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DOI: https://doi.org/10.1007/s44211-023-00330-8