Determination of chlorpyrifos residues in apple (Malus domestica) before and after soaking treatments using solid phase microextraction (SPME) and gas Chromatography mass spectrometry detector (GC-MSD) / Mohd Zudi Mohd Zahari
The residues of chlorpyrifos in apple (Malus domestica) were analyzed by method of solid phase microextraction (SPME) coupled to gas chromatography with mass spectrometry detector (GC-MS). Experiments were carried out to optimize the SPME conditions in order to enhance the fiber performance an...
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| Format: | Student Project |
| Language: | English |
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Faculty of Applied Sciences
2008
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| Online Access: | http://ir.uitm.edu.my/id/eprint/830/ http://ir.uitm.edu.my/id/eprint/830/1/PPb_MOHD%20ZUDI%20MOHD%20ZAHARI%20AS%2008_5.pdf |
| Summary: | The residues of chlorpyrifos in apple (Malus domestica) were analyzed by method of
solid phase microextraction (SPME) coupled to gas chromatography with mass
spectrometry detector (GC-MS). Experiments were carried out to optimize the SPME
conditions in order to enhance the fiber performance and obtain high amount of
chlorpyrifos extracted. It was found that the optimum SPME condition was extraction
temperature of 60o
C and extraction time of 20 min. The headspace SPME extraction
mode was applied to determine chlorpyrifos residues in apple after being exposed to
the pesticides. The effects of soaking treatments using tap water and non toxic
solutions namely 10% (w/v) salt solution and 10% (v/v) vinegar solution were
investigated with measurement of chlorpyrifos reduction in contaminated apple after
treatments were implemented. The results showed that the salt solution was the most
effective solution for chlorpyrifos removal at 84.84%, whereas soaking with tap water
was found to be the least effective with 66.25% and the reduction of chlorpyrifos
residues was 74% using vinegar. |
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