Abstract
Matrix solid-phase dispersion and gas chromatography-mass spectrometry were used for
the rapid screening of 36 pesticides in agricultural products. Homogenized sample
(0.5 g), C8-modified silica (0.5 g) and Na2SO4 (1 g) were mixed and transferred to a
cartridge containing activated silica (0.5 g). Best recoveries (>60%) were found using
dichloromethane-ethyl acetate (4:1) for elution. Analytical characteristics at spiking
levels (10–100 lg/kg) were calculated for each pesticide. Matrix effects were studied by
comparing the slopes of the matrix-matched calibration curves. Fruit and vegetable samples
from South Africa complied with EU and South African current regulation, except for
cypermethrin in green beans.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:tut/oai:encore.tut.ac.za:d1001435 |
| Date | 09 April 2010 |
| Creators | Covaci, A, Mashiya, JG, Molope, I, Tshiame, I, Molatlhegi, R, Ngobeni, P |
| Publisher | Taylor & Francis |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Text |
| Format | |
| Rights | Taylor & Francis |
| Relation | Analytical Letters |
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