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of 213
pro vyhledávání: '"J. D. R. Thomas"'
Autor:
Gwilym James Moody, J. D. R. Thomas
Publikováno v:
Catonic Surfactants ISBN: 9780429270376
The determination of surfactants in a variety of samples is commercially important. The classic method for anionic and cationic surfactants is the two-phase Epton titration. The modifications currently in use are subject to many of its disadvantages:
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b0fd62af43f0760881c3459825ebff23
https://doi.org/10.1201/9780429270376-9
https://doi.org/10.1201/9780429270376-9
Autor:
G. J. Moody, J. D. R. Thomas
Publikováno v:
Ion-Selective Electrode Methodology ISBN: 9781351073882
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fa7951d01dd2b98ff9e00ed366d4bc96
https://doi.org/10.1201/9781351073882-7
https://doi.org/10.1201/9781351073882-7
Autor:
G. J. Moody, J. D. R. Thomas
Publikováno v:
International Journal of Food Science & Technology. 14:535-538
Summary Of the methods available for ascorbic acid assay the one normally recommended is based on its reduction of the blue dye 2,6-dichlorophenolindophenol to give a colourless product (Nicholls, 1945; Pearson, 1962). Another procedure depends on th
Autor:
J. D. R. Thomas, G. J. Moody
Publikováno v:
International Journal of Food Science & Technology. 12:193-197
Publikováno v:
International Journal of Food Science & Technology. 15:335-343
Autor:
A. V. Jones, J. D. R. Thomas
Publikováno v:
International Journal of Food Science & Technology. 3:1-14
Summary. The visible absorption spectra of twenty-two food dyes have been plotted both in the free state and in the presence of added calcium, magnesium, aluminium, iron (II), iron (III), copper (II) and cobalt (II) ions at the pH values 3.0, 6.4, 7.
Autor:
J. D. R. Thomas
Publikováno v:
Journal of Applied Chemistry. 12:289-294
Bitumen extracted from high-moor peat has an ultra-violet absorption maximum at 285 mμ. This has been used to follow the fractionation of a methanol-soluble extract of the bitumen on an anion-exchange column in the acetate form, with methanol, metha
Autor:
J. D. R. Thomas
Publikováno v:
Fresenius' Journal of Analytical Chemistry. 354:136-139
Examples are given of the beneficial use in the teaching of chemistry of fundamental principles upon which chromatography and electrophoresis are based.
Autor:
J. D. R. Thomas
Publikováno v:
Electroanalysis. 7:871-876
The role of ethoxylate-containing molecules as ion-selective electrode (ISE) type potentiometric sensors is illustrated by studies carried out in the author's laboratories [1]. The molecules discussed include long chain acyclic polyethoxylates, crown
Autor:
J. D. R. Thomas
Publikováno v:
TrAC Trends in Analytical Chemistry. 14:186-190
The effects on analytical chemistry of the banning of the production and use of ozonedepleting substances (ODSs) by the Montreal Protocol of Substances that Deplete the Ozone Layer (1987) are discussed. Attention is given to the concessions made to c