( 3 ) the piezoelectric quartz crystal impedance ( qci ) technique was employed to monitor in situ the pb2 + - induced precipitation of bsa onto a gold electrode and the precipitate dissolution via edta in an aqueous solution ( 3 )用压电石英晶体阻抗法( pqci )现场监测了水溶液中铅离子诱导牛血清白蛋白( bsa )沉淀及沉淀由na _ 2edta溶解的过程。
