A Selective Separation Method to Determine Radiostrontium in Water Samples Based on the Chelation of Potential...

Area of Science:

• Environmental Chemistry
• Radiochemistry
• Analytical Chemistry

Background:

• Accurate determination of radioactive strontium isotopes (strontium-89 and strontium-90) is crucial for environmental monitoring.
• Existing methods for strontium separation can be time-consuming, costly, or involve hazardous reagents.
• A need exists for a streamlined and efficient analytical procedure for strontium analysis in water.

Purpose of the Study:

• To develop a rapid, safe, and cost-effective method for separating strontium-89 and strontium-90 from water samples.
• To optimize the chemical recovery and decontamination efficiency of the proposed separation technique.
• To validate the method's performance using spiked samples and apply it to real-world environmental water samples.

Main Methods:

• Strontium separation involves precipitating interfering elements (barium and radium) with chromate, followed by strontium sulfate precipitation.
• Potential interfering ions in the strontium sulfate precipitate are removed using ethylenediaminetetraacetic acid (EDTA) chelation.
• Radioactive strontium isotopes (strontium-89 and strontium-90) are quantified using liquid scintillation counting (LSC).

Main Results:

• The developed method achieves an optimized chemical recovery of approximately 75% for strontium.
• High decontamination factors were determined for potential interfering radionuclides.
• Validation using spiked samples demonstrated the method's accuracy and reliability for environmental water analysis.

Conclusions:

• The new strontium separation method is rapid, safe, and cost-effective for determining strontium-89 and strontium-90 in water.
• The method provides reliable results, validated through spiked samples and successful application to environmental samples.
• This technique offers a valuable tool for routine monitoring of radioactive strontium in aquatic environments.