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Effects of preparation methods of biomedical samples on PIXE measurement sensitivity

✍ Scribed by T. Kupila-Rantala; M. Hyvönen-Dabek; J. Räisänen

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
609 KB
Volume
44
Category
Article
ISSN
0969-8043

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✦ Synopsis

Instrumental sample preparation techniques for PIXE measurements of human blood serum and bovine muscle were investigated. The techniques studied were direct measurement of a drop, drying on a foil and on an Al cup, lyophilization on a foil, pellet pressing of dried material, microtome sectioning and biopsy preparation. The same serum and muscle were used in each procedure allowing the comparison of detection limits between different methods. The most beneficial technique for both samples was lyophilization and pellet pressing.

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A spectrophotometric method was used for determining the compositions and colours of tap-water infusions of selected garden samples of tea, and to demonstrate the effects of temporary hardness in the water on colour. Other factors affecting colour, such as continued boiling of the water, variations