The use of Multi-Walled Carbon Nanotubes (MWCNT) as solid
sorbent in Matrix Solid-Phase Dispersion (MSPD) extraction and
preconcentration method was presented to determine some
commonly used organophosphorus insecticides/OPIs in honey
samples using a Gas Chromatography Flame Ionization
Detector (GC-FID). OPIs are poisonous compounds used to kill
insects and rodents by affecting their nervous system. The limit
of detections obtained after MSPD extraction were 7.0 ng/g for
Malathion, Malaoxon and Fenitrothion and 33.3 ng/g for
Isomalathion. The recovery of the insecticides from spiked
honey, ranged from 83.6% to 103.3% with % RSD ranged
from 9.8% to 12.3% (n=3). The correlation coefficient (R2) of
the calibration data varied from 0.9945 to 0.9987. Standard
addition method was utilized to examine matrix-induced effects
on analyte peaks, and to demonstrate the efficiency of the
method. The MSPD extraction was successfully applied for the
analysis of four honey samples but no insecticide residues were detected.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/2/12609590/index.pdf |
| Date | 01 June 2008 |
| Creators | Njie, Njaw |
| Contributors | Aygun, Ruveyde Sezer |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for METU campus |
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