Seeing Through the Barrier: Practical Limits and Best Practices for Raman Sample, Container, and Test Conditions

Spatially offset Raman spectroscopy (SORS), provides a powerful and non-destructive approach for identifying materials without opening packages or containers. However, measurement success depends strongly on sample characteristics, container materials, and testing conditions. This webinar presents an experience-based overview of what SORS-enabled Raman spectroscopy can and cannot reliably measure using the Agilent Vaya Raman spectrometer as a representative platform. We will discuss classes of materials that are Raman-inactive or weak, samples prone to fluorescence or low signal, and common container materials that interfere with or block Raman measurements. Practical guidance will be provided on container thickness, color, and composition, as well as when black shielding or ambient light control is required. The session will help users quickly assess feasibility, set realistic expectations, and determine when Raman—or an alternative technique such as FTIR—is the appropriate analytical choice.

Presenter: Yanqia Wang, PhD (Application Engineer, Molecular Spectroscopy, Agilent Technologies, Inc.)

Dr. Yanqia Wang started working for Agilent Technologies Inc. as a FTIR application Engineer in 2013, providing pre-&post-sale application support. The products he covers from Bench-top FTIR microscopes to various Mobile FTIR spectrometers. Dr. Wang received his PhD of analytical chemistry from Duke University in 2004, doing dynamic IR spectroscopy research. Then he joined Fitzpatrick Center for Photonics at Duke University, doing Tissue Raman spectrometer instrumentation. Since 2007, Dr. Wang worked for Avery Dennison Corp. as a spectroscopist, providing molecular analytical support to the research & development.