An Easy to Implement Approach for Laboratories to Visualize Particle Spread During the Handling and Analysis of Drug...

Area of Science:

• Forensic Science
• Analytical Chemistry
• Laboratory Safety

Background:

• Detectable drug levels are common on forensic laboratory surfaces, particularly in drug chemistry units, due to handling powdered evidence.
• The aerosolization and subsequent surface settling of particulate during evidence opening has not been previously visualized.

Purpose of the Study:

• To visualize the spread of particulate during drug evidence analysis.
• To introduce a method for laboratories to evaluate their evidence handling protocols.
• To assess the effectiveness of cleaning procedures in removing drug residues.

Main Methods:

• Simulated drug evidence bricks containing fluorescent particles were used.
• Particulate spread was monitored throughout the evidence handling and cleaning process.
• Visualization techniques were employed to track residue distribution.

Main Results:

• The opening of simulated drug evidence resulted in extensive particulate spread to various surfaces and handled items.
• Cleaning with methanol proved highly effective in removing nearly all released particulate.
• Visualization demonstrated the significant transfer of residues during routine analysis.

Conclusions:

• Visualization techniques can identify potential sources of background drug levels in forensic labs.
• Methanol cleaning is an effective decontamination method for drug residue.
• This approach can educate forensic chemists on trace residue dissemination and inform protocol optimization.