A Field-Portable Merane Introduction Mass Spectrometer
Sample was drawn into the MIMS system via two solvent-cleaned microporous stainless steel inlet filters in series (15 and 5 μm) (Model SS-6 F; Swagelok,Solon,OH,USA),and ¼ in. o.d. Teflon transfer lines (Cole Parmer). The air-sampling inlet was mounted on the roof rack of a sport utility vehicle,approximately 30 cm above the roofline.