关键词: 药物分析, 吡啶 P, 痕量分析, 肟, 电位法, 示波滴定, 倒数线路

Reciprocal oscillog. chronopotentiometry is a new method which can overcome some weak points of classical oscillog. chronopotentiometry such as low sensitivity and poor linear relationship. A new circuit with feeding back current for obtaining reciprocal oscillogram has been designed. The main advantages of the circuit are its higher sensitivity and better linear relationship. In the experiment, the authors apply a new method to determine peak potential of some organic substances. If the authors connect the anodic stripping circuit with the reciprocal oscillog. chronopotentiometric instrument, min. detectable amount of metal ion can be down to 10-9 mol/L. Experimental results also show there is a better linear relationship between peak height and concentration of depolarizer in solution of 10-8 mol/L.9

Key words: DRUGS ANALYSIS, PYRIDINE P, TRACE ANALYSIS, OXIME