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Original Articles

The Stability of Ethanol in Stored Forensic Blood Samples

, &
Pages 335-339 | Published online: 22 Nov 2013
 

ABSTRACT

Blood samples with ethanol added in the laboratory and stored in “approved” containers, as defined in Paragraph 254 (1) (b) of the Criminal Code of Canada (1), namely “VACUTAINER® XF 947” were analyzed by a gas chromatography (GC) method using an internal standard over a period of 31 weeks.

Additional blood samples of actual forensic cases received and stored in the laboratory for at least one year were also analyzed prior to destruction, and results compared with the analysis of the first sample. Ail samples exhibited a decline in ethanol concentration.

RÉSUMÉ

On a ajouté de l'éthanol à des échantillons de sang au laboratoire et on les a conservés dans des contenants dits “approuvés” selon l'article 254 (1) (b) du code criminel du Canada (1), notamment des “VACUTAINER® XF 947”. Ces échantillons ont par la suite été analysés sur une période de 31 semaines par une méthode de chromatographie en phase gazeuse.

Des échantillons de sang additionnels provenant d'enquêtes médico-légales véritables et conservés au laboratoire pour au moins un an ont été analysés de nouveau avant d'être détruits. Les résultats obtenus ont été comparés à ceux obtenus initiallement. On a observé une diminution d'alcoolémie dans tous les cas.

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