with the latter two truncated below zero. N.b. ( ) the partial pressures of the analyte and interferent are independent (most difficult case for sensing) and ( ) the mean partial pressure of the interferent, p0 I , is equal to the assumed mean in the modified inverse problem in eqn. 6. Fig. shows the distributions of gas compositions and measurement noise we impose. For a challenging sensing task, we set (1) the variance in the partial pressure of the interferent, K i σ i , as five times that of the analyte, K a σ a , and (2) the molecular weight of the interferent, w i , as 50% greater than that of the analyte, w a .