DETERMINATION OF RESIDUAL PHENOTHIAZINES IN LIVER BY MATRIX SOLID PHASE DISPERSION COMBINED WITH HPLC WITH FLUORESCENCE DETECTION

2009 ◽  
Vol 33 (2) ◽  
pp. 270-282 ◽  
Author(s):  
M. C. Quintana ◽  
J. J. Ramos ◽  
L. Hernández ◽  
L. Ramos
Keyword(s):  
Fluorescence Detection ◽  
Solid Phase ◽  
Matrix Solid Phase Dispersion ◽  
Phase Dispersion

scholarly journals Determination of Thiabendazole in Orange Juice and Rind by Liquid Chromatography with Fluorescence Detection and Confirmation by Gas Chromatography/Mass Spectrometry After Extraction by Matrix Solid-Phase Dispersion

2004 ◽  
Vol 87 (3) ◽  
pp. 664-670 ◽  
Author(s):  
Beatriz Albero ◽  
Consuelo Sánchez-Brunete ◽  
José L Tadeo
Keyword(s):  
Gas Chromatography ◽  
Liquid Chromatography ◽  
Fluorescence Detection ◽  
Orange Juice ◽  
Solid Phase ◽  
Extraction Column ◽  
Matrix Solid Phase Dispersion ◽  
Phase Dispersion ◽  
Relative Standard

Abstract A method was developed for the determination of thiabendazole (TBZ) in orange juice and rind based on matrix solid-phase dispersion (MSPD). TBZ was extracted with ethyl acetate and the extract was subsequently cleaned up on a solid-phase extraction column. Fungicide residues were determined by liquid chromatography with fluorescence detection. Recoveries through the method ranged from 87 to 97% with relative standard deviations ≤11%. The detection and quantitation limits were 0.15 and 0.50 μg/kg, respectively. The confirmation of TBZ residues in positive samples was performed by solid-phase microextraction followed by gas chromatography with mass spectrometric detection using selected ion monitoring. The developed method was applied to determine TBZ levels in commercial orange juices and in juice and rind of fresh oranges. The influence of storage and washing of fruits on TBZ residues was also studied.

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