Modulation of Host Learning in Aedes aegypti Mosquitoes 5/2/2020· Headspace collections lasted for 24 hr. Volatiles were eluted from the traps with 600 μL of 99% purity hexane (20ml headspace vials price Aldrich, St. Louis, MO, gas chromatography vials manufacturer), and samples were stored in 2 mL aer borosilie vials (VWR, Radnor, PA, gas chromatography vials manufacturer) with Teflon-lined