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Activity of dissolved AAO measured as a signal decrease caused by the addition of 8 (square) and 12 U (triangle) of enzyme to 100 µmol/L of l-ascorbic acid in 2 mL of buffer (working conditions: 100 mmol/L of phosphate buffer, pH=7.0, with 2 mmol/L of (HPO3)n and 100 mmol/L of KCl; flow rate of 2.0 mL/min; polarization potential of 450 mV)
