Effect of impurities in xylenol orange on the spectrophotometric readout method for alanine dosimetry

A useful spectrophotometric readout method for alanine dosimetry involves the oxidation of ferrous ions when irradiated alanine powder is dissolved in an acidic aqueous aerated solution (FX) containing ferrous sulphate and xylenol orange (XO). The present investigation shows that the impurities in r...

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Bibliographic Details
Published in:Applied radiation and isotopes 1994, Vol.45 (9), p.973-977
Main Authors: Jain, V., Gupta, B.L.
Format: Article
Language:English
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Summary:A useful spectrophotometric readout method for alanine dosimetry involves the oxidation of ferrous ions when irradiated alanine powder is dissolved in an acidic aqueous aerated solution (FX) containing ferrous sulphate and xylenol orange (XO). The present investigation shows that the impurities in reagent grade XO affect the ferric-XO-alanine complex formation as well as the characteristic ferric ion concentration vs dose plot. Therefore, a calibration is necessary for any batch of XO used in FX dosimeter solution preparation.
ISSN:0969-8043
1872-9800
DOI:10.1016/0969-8043(94)90237-2