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General
- Strontium is a
chemical element with the symbol Sr and the atomic number 38.
- An alkaline earth
metal, strontium is a soft silver-white or yellowish metallic element
that is highly reactive chemically. The metal turns yellow when exposed
to air.
- Strontium occurs
naturally in the minerals celestine and strontianite. The 90Sr isotope
is present in radioactive fallout and has a half-life of 28.90 years.
Process
- The synthesis of
fluorapatite and Sr-bearing fluorapatite, the results of which were
confirmed by X-ray powder diffraction analysis.
- Furthermore, the
characterization of pure fluorapatite and strontium-apatite was done
using spectroscopic methods such as FTIR, Raman and scanning electron
micro imaging techniques.
- The influence of
strontium on the fluorapatite crystal structure was closely investigated
by Raman and IR band shifts.
- In addition, a novel
fluorapatite synthesis procedure was also tested using a natural
fluorapatite sample. Products of this synthesis were also analyzed with
FTIR and crystallographic methods.
Application
- 89Sr is the active
ingredient in Metastron, a radiopharmaceutical used for bone pain
secondary to metastatic prostate cancer.
- The strontium acts
like calcium and is preferentially incorporated into bone at sites of
increased osteogenesis. This localization focuses the radiation exposure
on the cancerous lesion.
- 90Sr has been used as
a power source for radioisotope thermoelectric generators .
- 90Sr is also used in
cancer therapy. Its beta emission and long half-life is ideal for
superficial radiotherapy.
- Strontium is one of
the constituents of AJ62 alloy, a durable magnesium alloy used in car
and motorcycle engines by BMW.
Report
- Strontium can be
taken into the body by eating food, drinking water, or breathing air.
Gastrointestinal absorption from food or water is the principal source
of internally deposited strontium in the general population.
- On average, 30 to 40%
of ingested strontium is absorbed into the bloodstream. The amount
absorbed tends to decrease with age, and is higher in children in their
first year of life.
- Adults on fasting and
low-calcium diets can also increase intestinal absorption to these
levels, as the body views strontium as a replacement for calcium.
- Strontium behaves
similarly to calcium , but living organisms generally use and retain it
less effectively.
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