Ethylene oxide (EtO) is an important industrial precursor, critical element in the medical device supply chain, and also a known carcinogen, even at low concentrations. A particularly challenging compound to analyze, measurement technologies are only now catching up to the sensitivity and accuracy required to understand the sources and impacts of this contaminant of emerging concern. For the first time, new technologies are making it possible to measure ethylene oxide in ambient air to part-per-trillion concentrations. Read more in this article “The Current State of Ethylene Oxide in Ambient Air” by Entanglement Technologies’ Aurelie Marcotte in EM Magazine, a publication of the Air & Waste Management Association.