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Diazonium Coupling and Derivatization for the Analysis Of Carbamate Pesticides by Tlc and Gc

Rajesh, Gopaul (2005) Diazonium Coupling and Derivatization for the Analysis Of Carbamate Pesticides by Tlc and Gc. Masters thesis, University of Mysore.

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Abstract

This Dissertation / Report is the outcome of investigation carried out by the creator(s) / author(s) at the department/division of Central Food Technological Research Institute (CFTRI), Mysore mentioned below in this page.

Item Type: Thesis (Masters)
Additional Information: <p align="justify">The present work focuses on the development of two methods of analysis whereby both the selectivity and sensitivity are improved. The first method involves diazotization using two reagents separately followed by determination of minimum detection limits by TLC. The second method involves derivatization followed by determination of minimum detection limits by both TLC and GC. Both methods of analysis proved to be sensitive enough for the detection of carbamate pesticides. The order of sensitivity, as indicated by the minimum detectable limit was 1) derivatization using dimethyl chloridothiophophate followed by 2) coupling the hydrolysis product phenol from the carbamates with teraazotized 4,4’-diaminodiphenyl sulfone followed by the use of pnitrobenzenediazonium tetrafluoroborate as coupling reagent. The derivatized products after reaction with dimethyl chloridothiophophate were successfully analysed by GC without any thermal decomposition (as indicated by clear single peaks). Consequently, both techniques can be used successfully in the detection of carbamate pesticides in food commodities (Table 2.0) as per the maximum residue limits to be detected, and even below.</p>
Uncontrolled Keywords: carbamate pesticides tlc gc diazonium coupling
Subjects: 500 Natural Sciences and Mathematics > 04 Chemistry and Allied Sciences > 26 Pesticide Chemistry
Divisions: Human Resource Development
Depositing User: Food Sci. & Technol. Information Services
Date Deposited: 23 Feb 2007
Last Modified: 28 Dec 2011 09:26
URI: http://ir.cftri.com/id/eprint/393

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