A Molecularly Imprinted Electrochemical Gas Sensor to Sense Butylated Hydroxytoluene in Air

Figure 9

Testing results of the GR sensors in the range of 5–100 ppm in red and the GR-PB sensor in the range of 0.02 to 1 ppb in green along with the normalized resistance change are shown. At 0.3 ppb concentrations, the vacuum was purged to the sealed chamber, so the resistance increase happens with a slower slope.

(a)

(b)