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J Mass Spectrom ; 55(10): e4622, 2020 Oct.
Article in English | MEDLINE | ID: mdl-33210452

ABSTRACT

A novel, ecofriendly, and easy extraction and preconcentration method named as vortex-assisted spraying-based fine droplet formation liquid-phase microextraction was proposed for the determination of prochloraz at trace levels in orange juice samples by gas chromatography-mass spectrometry (GC-MS). In this novel system, extraction solvent is dispersed by the help of spraying apparatus instead of dispersive solvent. Various parameters of the method were carefully optimized to increase signal-to-noise ratio of the analyte. Under the optimum chromatographic and extraction conditions, limit of detection and limit of quantification were calculated as 3.2 and 10.8 µg/kg, respectively. Moreover, enhancement in quantification power for the GC-MS system was determined as 372 folds based on LOQ comparison. Relative recovery results for orange juice samples were found to be between 95.0-107.7% by utilizing matrix matching calibration. Furthermore, the developed method may be used to efficiently and simply extract other organic compounds for their determinations in several matrices.


Subject(s)
Citrus sinensis/chemistry , Fruit and Vegetable Juices/analysis , Gas Chromatography-Mass Spectrometry/methods , Imidazoles/analysis , Imidazoles/isolation & purification , Limit of Detection , Linear Models , Liquid Phase Microextraction , Pesticide Residues/analysis , Pesticide Residues/isolation & purification , Reproducibility of Results
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