Publication of a custom-instrument, built in collaboration with Dr. Cora Young, has been published in Analyst's 2016 special issue for Emerging Investigators. The design is a calibration source called Low Emission of Gases Oven for Long-lived Atmospheric Species or LEGOLAS (see mascot) and was demonstrated in this work to produce atmospherically relevant concentrations of perfluorinated carboxylic acids in the gas phase via acid displacement with HCl and HBr. The manuscript is available through open access at RSC.