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http://ir.mu.ac.ke:8080/jspui/handle/123456789/4782
Title: | GC-MS and ESI-MS detection of catechol |
Authors: | Kimutai, Stephen Kibet |
Keywords: | Catechol Derivatization GC-MS ESI-MS |
Issue Date: | Dec-2013 |
Publisher: | CRC Publications |
Abstract: | The study aimed at the detection of catechol using GC-MS and ESI-MS. Catechol is an excellent starting material for oxidative polymerization since it contains the very reactive two hydroxyl groups in ortho-position, like other polyphenols in nature. Polymerization of catechol is known to happen under oxidative conditions or by use of a catalyst. Catechol was silylated with BSTFA- TMCS shortly before being analyzed by GC-MS. The results obtained indicate that catechol polymerizes immediately on its own under ambient conditions (without oxygen saturation or pH adjustment) forming a dimer and trimer. Results from ESI-MS confirm the formation of dimers and trimers. The combination of these two techniques led to the proposal of plausible molecular structures. These structures are characterized by the presence of ether- and hydroxyl functional groups. Effect of two solvents; water and methanol was investigated whereby water yielded less mass fragments in the GC-MS analysis as compared to methanol. The results obtained are of great importance since catechol is a key reagent in most of the syntheses. Since polyphenols are present in the environment, it could be playing a vital role in dissolution, transport and complexation of metals. |
URI: | http://ir.mu.ac.ke:8080/jspui/handle/123456789/4782 |
Appears in Collections: | School of Engineering |
Files in This Item:
File | Description | Size | Format | |
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GC-MSandESI-MSdetectionofcatechol.pdf | 188.65 kB | Adobe PDF | View/Open |
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