【摘要】 提出微机化的二次微分示波计时电位法.在B-R缓冲液（pH 2）中,希夫碱在dE/dt-E示波图上产生灵敏的切口,切口电位E=-0.91V（vs.SCE）;在1.80×10^-5～1.14×10^-4mol/L范围希夫碱的浓度与二次微分曲线上去极剂峰高呈线性关系,r=0.9966;RSD≤6.0%（n=3）,合成样品测定回收率在97.0%～102.5%.更多还原

【Abstract】 A method for the determination of schiff bases by using computerized 2nd order differentiation oscillographic chronopotentiometry is developed. In this method, a sensitive incision in oscillogtam in B- R supporting electrolytes (pH 12) is caused by schiff bases and potential of incision is-0.91 V (vs .SCE). The peak height of depolarizer of dE2/dt2 -t curve is proportional to the concentration of schiffbases in the range of 1.80×10-5～1.14×10-4 mol/L. The relative standard deviation (RSD) is lessthan 6% (n=3) . Satisfactory resluts have been achieved in determination of schiff bases in syntheticsamples with a recovery of 97.0%～102.5% .更多还原