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PHOSPHORUS - 32
(32P)
| Physical Half-life: | 14.29 days |
| Radiations: | -ß 1709 keV |
|
| External Exposure: | The unshielded ß
doses from 1 mCi of 32P are 13,778 mRad/hr at 5 cm; 3443 mRad
at 10 cm; 141 mRad/hr at 50 cm |
|
| Biological Data: |
ALI | 0.6 mCi(ingestion), 0.9
mCi(inhalation) |
| Biological half-life |
257 days |
| Effective half-life |
13.5 days |
| Critical Organs |
Bone and whole body |
| Bioassay |
Urinalysis |
| Shielding: |
Plexiglass is recommended.
Range of ß in air is 20' and 0.3" in lucite. |
Monitoring
& Efficiency |
LSC (Eff. ~90%)
Thin-window GM (Eff. ~25%) |
Special Considerations
- The dose at contact of a 1 mCi vial of 32P is
in the order of 1000 mRad/hr. Avoid handling unshielded stock vials with
your hands, use forceps with rubber sleeves, and work at arms length.
- A microcurie of 32P on a cm2 of skin
gives a dose of about 8000 rads per hour. Wear gloves, lab coat and safety
glasses when handling radioactive solutions.
- Wear a radiation badge when handling 1.0 mCi or more of
32P.
- Monitor hands and work areas during and immediately after
work. Document survey results.
- Utilize shielding; do not put your hands over open
containers.
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