Abstract
A method was developed using matrix solid-phase dispersion, together with liquid chromatography with ultraviolet diode array detector for determination of carbofuran, difenoconazole, β-cyfluthrin, spirodiclofen and thiophanate-methyl in stem of coconut palm. The best results were obtained using 2.0 g of stem, 1.6 g of Florisil as sorbent and cyclohexane:acetone mixture (4:1). The method was validated using stem samples spiked with pesticides at four concentration levels (0.05-2.0 μg/g). Average recoveries ranged from 70 % to 114.3 %, with relative standard deviations between 1.2 % and 19.2 %. Detection and quantification limits were in the ranges 0.02-0.03 and 0.05-0.1 μg/g, respectively.
Publication types
-
Research Support, Non-U.S. Gov't
MeSH terms
-
4-Butyrolactone / analogs & derivatives
-
4-Butyrolactone / analysis
-
Acetone / chemistry
-
Carbofuran / analysis
-
Chromatography, High Pressure Liquid / methods*
-
Cocos / chemistry*
-
Cyclohexanes / chemistry
-
Dioxolanes / analysis
-
Magnesium Silicates / chemistry
-
Nitriles / analysis
-
Pesticide Residues / analysis*
-
Plant Stems / chemistry*
-
Pyrethrins / analysis
-
Reproducibility of Results
-
Solid Phase Extraction / methods*
-
Spiro Compounds / analysis
-
Thiophanate / analysis
-
Triazoles / analysis
Substances
-
Cyclohexanes
-
Dioxolanes
-
Magnesium Silicates
-
Nitriles
-
Pesticide Residues
-
Pyrethrins
-
Spiro Compounds
-
Triazoles
-
Florisil
-
Acetone
-
spirodiclofen
-
Cyclohexane
-
Thiophanate
-
difenoconazole
-
4-Butyrolactone
-
cyfluthrin
-
Carbofuran