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When eluted at a rate of 50 mL/minute, each generator eluate at the end of elution should not contain more than 0.02 microcuries of strontium 82 Sr and not more than 0.2 microcuries of 85 Sr per millicurie of 82 RbCl injection, and not more than 1 microgram of tin per mL of eluate. [8]
Strontium-89 (89 Sr) is a radioactive isotope of strontium produced by nuclear fission, with a half-life of 50.57 days. It undergoes β − decay into yttrium-89. Strontium-89 has an application in medicine. [2]
Strontium ranelate, a strontium(II) salt of ranelic acid, is a medication for osteoporosis marketed as Protelos or Protos by Servier. Studies indicate it can also slow the course of osteoarthritis of the knee. [ 1 ]
Pecher filed a patent in May 1941 for the synthesis of strontium-89 and yttrium-86 using cyclotrons and described the use of strontium for therapeutic uses . [24] The groundbreaking work of Pecher was forgotten for decades due to the classification of information linked to the Manhattan project and the American nuclear weapons program.
Radium-223 chloride, strontium-89 chloride and samarium-153 EDTMP are used to treat secondary cancer in the bones. [ 9 ] [ 10 ] Radium and strontium mimic calcium in the body. [ 11 ] Samarium is bound to tetraphosphate EDTMP , phosphates are taken up by osteoblastic (bone forming) repairs that occur adjacent to some metastatic lesions.
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The longest-lived of these isotopes, and the most relevantly studied, are 90 Sr with a half-life of 28.9 years, 85 Sr with a half-life of 64.853 days, and 89 Sr (89 Sr) with a half-life of 50.57 days. All other strontium isotopes have half-lives shorter than 50 days, most under 100 minutes.
85 Sr synth 64.84 d: ε: 85 Rb ... Strontium is a chemical element; it has symbol Sr and atomic number 38. An alkaline earth metal, strontium is a soft silver-white ...