Author:
H. Zittel Oak Ridge National Laboratory Analytical Chemistry Division Oak Ridge Tennessee (USA)

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Abstract  

The effect of gamma-radiation on the color intensity of a series of representative organic dyes, commonly used as pH indicators, has been studied. In aqueous medium, at commonly used concentration levels, the dyes demonstrate ability to indicate pH after gamma-doses of 103-104 r. In general all the dyes show less sensitivity to radiation in neutral or basic media than in acid media. The compounds demonstrate a pseudo first order degradation reaction rate which was shown to be the expected radiation effect zero order rate. Of those compounds studied, methyl orange proved to be the most sensitive to radiation while bromocresol green is the most resistant to radiation damage. It was found that addition of small amounts of ethyl alcohol to the medium was effective in decreasing dye radiation damage to a large degree.

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation
1968
Volumes
per Year
1
Issues
per Year
12
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)