A rapid extraction method for acidic drugs in hemolyzed blood

Area of Science:

• Forensic Toxicology
• Analytical Chemistry

Background:

• Accurate drug detection in post mortem blood is crucial for forensic investigations.
• Traditional extraction methods can be time-consuming and yield impure samples, complicating analysis.
• Efficient extraction of acidic drugs from hemolyzed blood presents unique challenges due to lipid co-extraction.

Purpose of the Study:

• To develop a simple, rapid, and efficient method for extracting acidic drugs from whole post mortem blood.
• To improve the purity of extracts for subsequent gas chromatographic analysis.
• To achieve high recovery rates for acidic drugs at microgram/mL levels.

Main Methods:

• Utilized octadecasilane bonded silica for adsorption-based extraction.
• Blood samples were diluted and passed through an extraction column.
• Drugs were eluted with methanol, followed by extraction into diethylether, methylation, and chromatography.

Main Results:

• Achieved generally in excess of 80% recovery for acidic drugs at the microgram/mL level.
• Substantially reduced co-extracted lipids compared to conventional methods.
• The procedure was suitable for up to 2 mL of blood, providing clean extracts.

Conclusions:

• The described method offers a simple and efficient approach for acidic drug extraction from post mortem blood.
• The technique significantly enhances extract purity, facilitating reliable gas chromatographic analysis.
• This method is valuable for forensic toxicology, improving the accuracy and efficiency of drug identification in post mortem samples.