Thesis-1982-Abdalla.pdf (3.32 MB)
Analytical studies of some [beta]-lactam antibiotics
thesis
posted on 2018-05-23, 11:57 authored by Mohamed A. AbdallaAll cephalosporins studied have been shown to give hydrogen
sulphide. The yield of hydrogen sulphide varies widely for different
cephalosporins, but is highly reproducible for individual
cephalosporins. The hydrogen sulphide formed can be converted into
methylene blue directly in the degraded solution, and this procedure
has been made the basis of a calorimetric method of determining cephalosporins.
Penicillins do not give hydrogen sulphide under these
conditions and the method is thus selective for cephalosporins.
The manual visible spectrophotometric method for the determination
of cephalosporins by alkaline degradation to sulphide and formation of methylene blue has been adapted for use with an air-segmented
Autoanalyser I system. The system has been tested as a method of
determining trace amounts of cephalosporins and other sulphideproducing
impurities in penicillin G and penicillin V samples.
The detection limit was calculated to be 1–2 μg.g-1 of cephalosporin
in penicillin samples. [Continues.]
History
School
- Science
Department
- Chemistry
Publisher
© Mohamed Abuelhassan AbdallaPublisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Publication date
1982Notes
A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy at Loughborough University.Language
- en