Overview
- University of Michigan researchers report in March 2026 that disposable nitrile and latex gloves can shed stearate residues that spectroscopy misreads as microplastics.
- Tests across seven glove types produced about 2,000 false signals per square millimeter on average, with some cases above 7,000, driving up counts of very small particles.
- The residues are stearate salts added so gloves release from molds, and their light signatures closely match polyethylene in common vibrational-spectroscopy scans.
- The team released reference spectra and analysis steps to flag glove-derived particles, and it urges cleanroom or stearate-free gloves or no glove contact when safety allows.
- Researchers say some previous datasets may need review, yet they stress plastic pollution remains real, with improved methods expected to yield more accurate exposure estimates.