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[Study on time-resolved fluorimetry of samarium]
Guang Pu Xue Yu Guang Pu Fen Xi = Guang Pu
|February 1, 1997
Summary
Time discrimination with a pulsed laser and gate detection enhances laser fluorimetry for detecting fluorescent complexes. This method achieves high sensitivity and accuracy for ultratrace samarium determination.
Area of Science:
- Analytical Chemistry
- Spectroscopy
- Laser Fluorimetry
Context:
- Ultratrace analysis of fluorescent complex mixtures presents challenges in signal suppression and detection limits.
- Traditional methods may struggle with sensitivity and specificity in complex matrices.
Purpose:
- To demonstrate the efficacy of time discrimination in a laser fluorimetric system for enhanced sensitivity.
- To develop a simple, highly sensitive method for ultratrace determination of fluorescent complexes, specifically samarium.
Summary:
- A simple and highly sensitive laser fluorimetric system utilizing time discrimination with a pulsed laser and pulse-gate detection is presented.
- This technique effectively suppresses unwanted signals, lowering the minimum detectable concentration for fluorescent complexes.
- The method achieved a linear range of 0.01-10 µg/mL, a detection limit of 3.3 ng/mL, and an RSD of 3.7% for Sm3+ at 0.5 µg/mL.
Impact:
- Provides a robust method for ultratrace determination of fluorescent compounds, particularly valuable in rare earth element analysis.
- The demonstrated utility of time discrimination offers a pathway for improving sensitivity in various fluorimetric applications.
- Successfully applied to determine samarium in rare earth mixtures with high recovery rates (90.0-110.0%).