Benjamin T. Manard*, Kayron T. Rogers, Brian W. Ticknor, Shalina C. Metzger, N. Alex Zirakparvar, Benjamin D. Roach, Debra A. Bostick, and Cole R. Hexel Abstract The ability to directly measure uranium isotope ratios on environmental swipes has been achieved through a solution-based microextraction process and represents a significant advancement toward the development of a …