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Beryllium Measurement by Optical Fluorescence in Samples Contaminated by Strongly Fluorescent Impurities
Anoop Agrawal
Juan Carlos Lopez Tonazzi
Lori Adams
Akshay Agrawal
John P. Cronin
Brandy Duran
出版
ASTM International
, 2011
URL
http://books.google.com.hk/books?id=mQV8zgEACAAJ&hl=&source=gbs_api
註釋
A fluorescence method for determination of beryllium and beryllium oxide particles has been approved as a standard test method by ASTM International and the National Institute for Occupational Safety and Health. The procedure involves dissolution of samples in ammonium bifluoride solution and adding a small aliquot of extract to a basic hydroxybenzoquinoline sulfonate fluorescent dye and measuring its fluorescence. This method is specific to beryllium and is not affected by the presence of other metals. However, the results from such a method may be compromised by organic fluorescent impurities which have optical characteristics similar to the beryllium-bonded hydroxybenzoquinoline sulfonate. This study demonstrates that such impurities can be effectively removed by activated charcoal without compromising the sensitivity of the method or any other test attributes.
