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Sulfur 35

Sulfur 35. Characteristics. Radioactive half-life: 87.4 days Decay mechanism: Beta emission Energy: Emax = 167 keV Eavg = 49 keV Contamination monitoring: Thin window Geiger-Mueller detector, liquid scintillation counter for wipe surveys Dosimetry : Urinalysis. Decay Table.

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Sulfur 35

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  1. Sulfur 35

  2. Characteristics • Radioactive half-life: 87.4 days • Decay mechanism: Beta emission • Energy: Emax = 167 keV Eavg = 49 keV • Contamination monitoring: Thin window Geiger-Mueller detector, liquid scintillation counter for wipe surveys • Dosimetry: Urinalysis

  3. Decay Table

  4. Volatility • Radiolysis of S-35 labelled amino acids may lead to the release of S-35 labelled volatile impurities. Delivery vials should therefore be opened in a fume hood

  5. Stabilizers • The addition of stabilizers (buffers) will reduce, but not eliminate, the evolution of S-35 volatiles from tissue culture media. Incubators should be checked for contamination after using S-35 methionine or other volatile compounds.

  6. Differentiation Difficulty • S-35 may be difficult to distinguish from C-14. If both nuclides are being used in the same laboratory, establish controls to ensure they are kept separate. If "unknown" contamination is found, treat it as C-14.

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