铝制食具和橡胶制品中锌的快速示波极谱法

摘要

It was found that in the solution of 0.1mol／L HAc（pH2.8） and diamine sulfate, on the dropping mercury electrode a sensitive reduction wave of zinc was produced at the potential of -1.06V（vs.SCE）. The relationship of peak height with concentration of zinc was linear in the range of 0.03-2.0μg／mL Zn2＋.This method has a good selectivity and repeatability. When it was used for the determination of zinc in aluminium-wares and rubber products, the recovery of zinc was 95.6％-110.4％，and relative standard deviation was ＜5％ with satisfactory results.%在0.10mol／L乙酸（pH2.8）及硫酸联胺底液中，锌在滴汞电极上产生一个灵敏的极谱还原波，峰电位（Ep）为-1.06V（vs.SCE）。锌浓度在0.03～2.0μg／mL范围内与波高呈良好的线性关系。方法的选择性高、重复性好。用于铝制食具、食品用橡胶制品中锌的测定，回收率为95.6％～110.4％，RSD＜5％，结果令人满意。