Through-container analysis with Raman spectroscopy

Significance of the topic

Rapid, non-destructive identification of unknown substances through packaging greatly enhances safety and efficiency in fields from law enforcement to industrial quality control. The ability to analyze materials without direct contact mitigates exposure risks and speeds decision-making in high-stakes environments.

Objectives and article overview

This application note introduces the Metrohm TacticID-1064 ST handheld Raman spectrometer using 1064 nm excitation for through-container analysis. It outlines the device’s capability to penetrate various packaging materials, describes sampling options, and presents best practices for reliable identification of concealed substances.

Methodology and instrumentation

The TacticID-1064 ST employs a specialized See-Through (ST) Smart Attachment and proprietary data-analysis algorithms to separate container and sample spectra. Key sampling attachments include:

• See-Through (ST) Attachment for opaque or multi-layer barriers
• General Attachment (5.5 mm working distance) for solids, gels, liquids in clear containers
• Long Working Distance (8 mm) with optional Bottle Adapter for thick-walled vessels
• Short Working Distance for direct contact on thin transparent packages

Automatic and manual container modes optimize spectral matching across diverse barrier types.

Main results and discussion

Through-container scans yield reliable spectra in seconds for a wide range of analytes—including narcotics, pharmaceuticals, and explosives—within plastic bags, glass vials, envelopes, and multi-layer materials. Sample reports overlay measured and reference spectra, clearly distinguishing container contributions.

Benefits and practical applications

• First responders: rapid screening of mail, suspicious packages, and homemade devices without opening containers
• Customs and border control: on-the-spot verification of incoming goods
• Manufacturing QA/QC: 100% raw material inspection at receipt, reducing lab backlog

Future trends and potential applications

Advances may include expanded spectral libraries, enhanced machine-learning algorithms for more complex mixtures, and integration with automated inspection lines. Miniaturization and connectivity features could further extend use in remote or networked monitoring systems.

Conclusion

The TacticID-1064 ST represents a significant advancement in Raman spectroscopy by enabling true see-through analysis of opaque and colored barriers. Users benefit from faster, safer, and more accurate material identification in diverse field and industrial settings.

Reference

None reported.