A rapid, near real-time PAH quantitation method using a KinExA Inline Biosensor (Sapidyne Instruments, Boise, ID, USA) coupled with a murine anti-PAH monoclonal antibody, 2G8, has been demonstrated to have uniform selectivity for parent and alkylated PAH compounds in the 3- to 5-ring range (Li et al., 2016). Here, PAH is linked to pulmonary arterial hypertension.