Research Article
Organic Membranes for Selectivity Enhancement of Metal Oxide Gas Sensors
Figure 11
Separation characteristics of the membranes PC, PEEK, and PES (a) and PI and PEI (b) during the exposure to an increased concentration of CO (100 ppm) and CH4 (3,000 ppm) and 1 ppm NO2 and 1 vol% CO2. The diameter of the membranes is 6.4 mm.
| (a) |
| (b) |