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http://hdl.handle.net/123456789/356
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| Title: | SAMPLE PREPARATION METHODS FOR QUANTITATIVE EXTRACTION OF TRIAZINE AND ITS METABOLITES IN SEDIMENT SAMPLES OF AWASSA AND ZIWAY LAKES |
| Authors: | Nigussie, Lemma |
| Advisors: | Dr. Negussie Megersa |
| Copyright: | 2007 |
| Date Added: | 12-Dec-2007 |
| Publisher: | Addis Ababa University |
| Abstract: | A total of 21 sediment samples were collected from Awasa and Ziway Lakes for triazine
herbicide residues and their metabolites analysis. The samples were air dried and
extracted following standard procedures. All of the organic extracts were yellow colored
and also some particulates were present. For this reason and for the possible presence of
macro-organic compounds a florisil clean up was carried out. The intense yellow color of
the extracts was significantly reduced but it was not totally removed, therefore, further
clean up by activated charcoal is required. Moreover, the moisture contents of the
sediment samples were also determined prior to the analyte extraction. It was found that
the moisture contents determined were around 1 %, except fro one sample collected from
Ziway whose value was around 3.8 %. The relatively high value obtained here could be
due to muddy nature of the sample, which could also be seen visually. The extracts were
stored at 4oC in a refrigerator for future HPLC analysis. |
| URI: | http://hdl.handle.net/123456789/356 |
| Appears in: | Thesis - Chemistry
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