| Abstract: | Abstract Lysine can be determined by adsorptive voltammetry after derivatization with acetaldehyde in 1.3 x 10?2mol/ L borax-NaOH buffer solution (containing 4 x 10?3mol/ L of CH3CHO at pH10). The Schiff's base product of the derivation can be adsorbed on a hanging mercury electrode and reduced with peak potential of about -1.33v (vs.SCE) after 120s pre-concentration time. The derivative peak height is linearly proportional to the concentration for lysine in the range 6.0 x 10?7-1.0 x 10?5mol/ L. The detection limit is 4.0 x 10?7mol/ L. Using this method, we have directly determined lysine in nutrition samples without any pre-separation step. |
