Mixing ratios measured in flasks collected on August 3, 2014. Mixing ratios measured in flasks collected on August 3 displaying coefficients of determination of ethane vs. propane (a), benzene vs. propane (b), n-butane vs. propane (c), and n-pentane vs. propane (d). DOI: https://doi.org/10.1525/elementa.254.f12