A New Fluorometric Dosimetry for Low-medium Gamma Radiation Doses

Area of Science:

• Radiation Chemistry
• Analytical Chemistry
• Materials Science

Background:

• Chemical dosimetry is crucial for accurately measuring radiation doses.
• Schiff bases offer potential as sensitive analytical reagents.
• Developing cost-effective and sensitive dosimeters is an ongoing research need.

Purpose of the Study:

• To evaluate N-N '-bis(salicylidene)-1,3-propanediamine (LH2) as a chemical dosimeter for gamma radiation.
• To investigate the effect of ethanol/water composition on the dosimetric properties of LH2.
• To assess the performance of LH2-Zn complexes for enhanced sensitivity and accuracy in dosimetry.

Main Methods:

• Preparation of LH2 solutions in varying ethanol/water ratios.
• Irradiation of solutions with different gamma-ray doses.
• Fluorometric analysis of non-irradiated and irradiated solutions.
• Formation and analysis of LH2-Zn complexes to improve sensitivity.
• Determination of analytical parameters: linearity, LOD, LOQ, repeatability, and reproducibility.

Main Results:

• Fluorescence intensity of LH2 decreased with increasing gamma radiation dose.
• Optimal dose range for LH2 solutions was wider with 40-60% water content.
• LH2-Zn complexes exhibited enhanced sensitivity for dosimetry.
• The developed chemical dosimetry system demonstrated good linearity, sensitivity, and reproducibility.
• The system is effective for measuring doses in the 0.04-5 kGy range.

Conclusions:

• N-N '-bis(salicylidene)-1,3-propanediamine (LH2) is a viable chemical dosimeter for low-medium gamma-ray doses.
• The LH2-based dosimetry method is simple, sensitive, reproducible, and cost-effective.
• This method shows promise for applications in food irradiation dosimetry.