Inhibitor | Conc. ppm | Hydrogen evolved ml | θ | %IE | ||
Turmeric extract | 1 M HCl | 6.20 | --- | --- | ||
50 | 4.65 | 0.250 | 25.0 | |||
100 | 4.03 | 0.350 | 35.0 | |||
150 | 3.60 | 0.419 | 41.9 | |||
200 | 3.30 | 0.468 | 46.8 | |||
250 | 2.90 | 0.532 | 53.2 | |||
300 | 2.60 | 0.581 | 58.1 | |||