Researchers Tested Laser Tech to Find Pesticide Residues
A new spectroscopy method successfully identified toxic insecticide traces on historical museum objects.
Updated on Oct. 2, 2026 in Chemistry
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Scientists from USP and UCLA have deployed Surface-Enhanced Raman Spectroscopy to detect legacy pesticide residues on diverse museum artifacts. The technology successfully identified permethrin on materials including cotton, wood, and feathers.
Why it matters
Permethrin, historically applied to preserve museum collections, poses ongoing health risks to conservators and Indigenous communities who handle these items. This detection method offers a safer way to monitor hazardous decontamination efforts.
Researchers utilized Surface-Enhanced Raman Spectroscopy to trace permethrin residues that have persisted on artifacts for decades. The study confirmed the technique's capability to monitor the reduction of pesticide levels following gamma radiation decontamination.
The players
USP
The University of São Paulo is a leading research institution involved in the collaboration to improve museum conservation safety.
UCLA
The University of California, Los Angeles contributed research expertise to the project focusing on chemical detection methods.
Museum of Archaeology and Ethnology
This facility provided the historical artifacts used as samples to test the pesticide detection technique.
The details
The study involved testing artifacts from the USP Museum of Archaeology and Ethnology to determine if chemical insecticides could be identified after years of storage. By using spectroscopy, the team successfully mapped chemical signatures on organic materials that frequently trap toxic residues.
Timeline
October 2, 2026: The study results were published.
The Big Picture
This research follows a pattern set by the use of gamma radiation for cultural heritage decontamination. It shifts the discipline toward precision monitoring, providing a verification tool that replaces less reliable legacy assessment methods.
This diagnostic capability will allow curators and conservators to identify contaminated items without damaging delicate historical fibers. It facilitates safer handling protocols for staff and community members interacting with indigenous collections.
The takeaway
Advanced spectroscopic analysis provides a critical layer of safety for those who manage and engage with historically treated artifacts. Future conservation efforts can now rely on these precise metrics to ensure toxic chemical levels are safely reduced before objects are handled.
Further reading
For more on analytical techniques, visit the Chemistry section.
Source note: This article includes information reported by Jornal da USP.
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