【摘要】 常规电位溶出分析(P.S.A)和微分电位溶出分析(D.P.S.A)的模拟仪器[1][2],难于准确控制预电解电位和扣除背景。对P.S.A而言,难于准确记录溶出过渡时间,无法放大时间参量。因此,模拟仪器的灵敏度、分辨率较差。为解决上述问题,本系统采用DBJ-Z80单板机,配以相应接口、控制线路及软件,根据P.S.A理论曲线方程[3]和我们推导的D.P.S.A理论曲线方程,在该机上实现了一次实验就可分别给出P.S.A和D.P.S.A两种分析结果。实验结果可用X-Y记录仪绘出实验曲线,也可打印输出,或两者同时给出。在该机上验证了D.P.S.A理论,结果与理论相符。分析的准确度、灵敏度、分辨率均优于模拟仪器,达到了国外微机控制的同类仪器[4]～[7]水平。更多还原

【Abstract】 Analogue instruments for potentiometric stripping analysis (P.S. A) and differential potentiometric stripping analysis (D. P. S. A) are difficultin accurately controlling pre-electrolyse potential, and elminating the backgro-und. For P. S. A., it is very diffioult to measure the stripping transition time,unable to amplify parameter of time, so the sensitivity and resolution of anal-ogue instruments are not so well. This system employs a DBJ-Z80 single boardcomputer accompanied with proper interfaces of ADA, controlling circuits andprograms. We computerize the both P. S. A. and D. P. S. A. methods in this system. Itcan use only once experimental data to give the two analysis results of thetwo analysis methods. The experimental curves agree with the theoretical curveequations of P. S. A. and D. P. S. A. The experiment results can be printed outand experiment curves can be drawn with a x-y recordor. The accuracy, thesensitivity, and the resolution of this system are superior to those of analogueinstruments, and it has reached the same level as the same kind of computer-controiling instruments made abroad.更多还原