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Selenium measurement in human plasma with Zeeman effect electrothermal atomic absorption spectrometry: sample
Rosa Sabé1, Roser Rubio, Lydia García-Beltrán
1Departament de Química Analítica, Universitat de Barcelona, Barcelona, Spain.
Summary
Plasma samples remain stable for selenium analysis for at least one year when stored at -20°C. Different calibration methods yield significantly different selenium content results, highlighting the importance of method selection.
Area of Science:
- Clinical Chemistry
- Analytical Chemistry
- Trace Element Analysis
Background:
- Accurate selenium determination in plasma is crucial for health assessment.
- Variability in sample storage and calibration methods can impact analytical results.
Purpose of the Study:
- To evaluate the stability of plasma samples for selenium determination over time and varying temperatures.
- To compare the efficacy of two distinct calibration methods: standard addition and matrix-matched calibration.
Main Methods:
- Plasma samples were analyzed for selenium content using two calibration techniques.
- Sample stability was assessed at -20°C over an extended period.
Main Results:
- Significant differences in measured selenium content were observed between the two calibration methods.
- Plasma samples demonstrated stability for selenium determination for at least one year when stored at -20°C.
Conclusions:
- Storage at -20°C ensures plasma sample stability for long-term selenium analysis.
- The choice of calibration method significantly influences selenium determination results in plasma.