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Digitale Medien

Determination of phosphorus in polymers by INAA (1998)

St-Pierre, J. ; Kennedy, G.

Springer

Journal of radioanalytical and nuclear chemistry 234 (1998), S. 51-55

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ISSN: 1588-2780

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie , Energietechnik

Notizen: Abstract An INAA technique employing beta spectrometry was developed for the determination of phosphorus in polymers. The (n,γ) reaction on phosphorus produces32P, half-life 14.3 days, a pure beta emitter with end-point energy 1.71 MeV. Polymer samples in the form of powders, films and pellets are irradiated and then counted with a plastic scintillator. The beta spectrum is corrected for interferences (especially Sb, Zn and Br which are quantified by gamma spectrometry) and for energy loss in the thick sample. Samples must also be analyzed for S and Cl which cause nuclear interferences. With an irradiation time of 4 hours at a neutron flux of 5·1011 n·cm−2 s −1, decay time 10 days and counting time 10 minutes, the sensitivity is 520 counts/μg phosphorus and the detection limit is typically 2μg/g.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02389746

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