"Outside The Box" Raman Spectroscopy: Remote Measurements For Bulk Samples

By Matthew Gabel, Ph.D.

Remote Raman spectroscopy offers a practical solution for analyzing bulk samples when traditional focus-dependent methods fall short. By enabling measurements at distances up to one meter without precise focusing, this approach simplifies workflows for applications like plastics recycling and hazardous environments. Key factors influencing signal quality include sampling pathlength, shielding placement, sample thickness, and substrate reflectivity. Tests show that reflective, Raman-inactive substrates and thicker samples significantly enhance signal strength, while angular orientation has minimal impact. This technique delivers clear identification of polymers—even in thin, multilayered materials—making it ideal for high-throughput screening and versatile experimental setups. Explore how remote Raman collection expands analytical possibilities without complex standoff systems.