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Storage of blood samples containing alcohol
Acta Pharmacologica Et Toxicologica
|October 1, 1979
Summary
Blood alcohol sample storage at -20°C for six months is reliable. Repeated freeze-thaw cycles did not significantly alter blood alcohol concentration results, ensuring sample integrity for forensic analysis.
Area of Science:
- Forensic Science
- Analytical Chemistry
- Toxicology
Background:
- Accurate blood alcohol concentration (BAC) measurement is crucial for legal and medical purposes.
- Standardized protocols for blood sample storage are essential to maintain sample integrity over time.
Purpose of the Study:
- To evaluate the stability of blood alcohol samples stored at -20°C for extended periods.
- To assess the impact of repeated freeze-thaw cycles on the accuracy of BAC measurements.
Main Methods:
- Blood samples were analyzed for alcohol content.
- Samples were stored at -20°C for six months and reanalyzed.
- The freeze-thaw cycle's effect was tested by repeating the process three times before analysis.
Main Results:
- Reanalysis after six months showed no significant deviation from original BAC results.
- Repeated freeze-thaw cycles did not introduce significant variability in BAC measurements.
- Results remained consistent compared to fresh blood samples.
Conclusions:
- Blood alcohol samples stored at -20°C maintain stability for at least six months.
- The freeze-thaw process does not compromise the accuracy of blood alcohol analysis.
- This storage method is suitable for preserving blood samples for forensic toxicology.