Validation of thin layer chromatography with AccuTOF-DART™ detection for forensic drug analysis

Area of Science:

• Forensic Chemistry
• Analytical Chemistry
• Mass Spectrometry

Background:

• Thin layer chromatography (TLC) is a standard technique for forensic drug analysis of pharmaceuticals.
• Visualization often requires spray reagents, followed by confirmation using gas chromatography-mass spectrometry (GC-MS).
• GC-MS confirmation can be time-consuming, often exceeding one hour.

Purpose of the Study:

• To propose and validate a streamlined method combining TLC with Direct Analysis in Real Time (DART™) for forensic drug identification.
• To reduce the time required for confirmation of TLC analyses.
• To assess the sensitivity and selectivity of the combined TLC-DART™ technique.

Main Methods:

• Thin layer chromatography (TLC) was performed on pharmaceutical preparations.
• Direct Analysis in Real Time (DART™) coupled with time-of-flight mass spectrometry was used for detection.
• TLC-DART™ results were compared to conventional GC-MS analysis.

Main Results:

• The combined TLC-DART™ method successfully screened and identified drug compounds from the same TLC plate.
• DART™ confirmations of TLC analyses were completed in under 10 minutes.
• TLC-DART™ demonstrated comparable sensitivity and selectivity to GC-MS.

Conclusions:

• TLC-DART™ offers a rapid and effective alternative for the forensic identification of pharmaceutical components.
• This method significantly reduces analysis time compared to traditional GC-MS confirmation.
• The validated TLC-DART™ technique enhances efficiency in forensic drug screening.