Figure 10.
The normalised change of colour signal of control and starch/PANI (0.1%, 0.2%, 0.3%, 0.4%, 0.5%) films against (a) 200 ppm; (b) 400 ppm; (c) 600 ppm; (d) 800 ppm; (e) 1000 ppm ammonia solution.
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