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(a) Volume expansion factor, as a function of arsenazo-I concentration for Al in 0.6 M malonic acid; FTIR-spectroscopy: malonic acid without arsenazo-I, ja = 15, 78, 134, 200 mA·cm−2 (dashed lines); (b) malonic acid with 3 g·L−1 arsenazo-I, ja = 15, 100, 200 mA·cm−2 (solid lines).
