Profiling of impurities in illicit amphetamine samples by high-performance liquid chromatography using column...

Area of Science:

• Analytical Chemistry
• Forensic Science

Background:

• Illicitly produced amphetamine often contains various impurities.
• Accurate impurity profiling is crucial for forensic analysis and quality control.

Purpose of the Study:

• To develop a simple, high-performance liquid chromatographic (HPLC) method for routine impurity profiling of illicit amphetamine.
• To enable automated on-line extraction and analysis of amphetamine impurities.

Main Methods:

• Developed a direct injection HPLC method using acetonitrile-citrate buffer.
• Employed on-line solid-phase extraction (SPE) with a C8 column for impurity enrichment.
• Utilized a C18 analytical column with a gradient elution for separation.
• Monitored compounds using UV detection at 220 and 254 nm.

Main Results:

• Achieved efficient on-line enrichment of impurities.
• Successfully separated amphetamine impurities from the main compound and polar diluents.
• Total extraction and analysis time was reduced to 30 minutes.
• The method demonstrated suitability for automated processing.

Conclusions:

• The developed HPLC method is simple, rapid, and effective for routine impurity profiling of illicit amphetamine.
• The on-line automated extraction and analysis enhance efficiency and suitability for forensic laboratories.