论文部分内容阅读
差分脉冲极谱具有很高的分析灵敏度,它比经典极谱灵敏度提高了两个数量级以上,并且比方波极谱有更多的优点,主要是对于不可逆体系同样可以得到良好的伏安图形。因此凡是具有极谱活性的无机离子或有机化合物均能测定,一般来说检测限均在5×10~(-8)M 左右。但是差分脉冲极谱的直流电压扫描速度和一般极谱仪相似,是十分缓慢的,一般为2毫伏/秒。为了提高脉冲极谱的分析速度,Blutstein 和Bond 首先在滴汞电极上进行了快扫描差分脉冲极谱的研究。其后 Burrows 等研究了稳态电极的差分脉冲极谱。上述两种情况,加快扫描速度而保持合理取样点的方法都是缩短脉冲周期和取样时间。在滴
Differential pulse polarography has a high analytical sensitivity, which is more than two orders of magnitude higher than the classical polarographic sensitivity, and has more advantages than the square wave polarography, mainly for irreversible system also can get a good voltammogram. Therefore, all with polarographic activity of inorganic ions or organic compounds can be measured, in general, the detection limit of about 5 × 10 ~ (-8) M or so. However, differential pulse polarography of the DC voltage scanning speed and general similar to the polarography, is very slow, usually 2 mV / s. In order to improve the speed of pulse polarography analysis, Blutstein and Bond first conducted a rapid scanning differential pulse polarography at the droplet mercury electrode. Subsequently, Burrows et al. Studied differential pulse polarography of steady-state electrodes. In both cases, methods of speeding up the scan while maintaining a reasonable sampling point are to shorten the pulse period and the sampling time. In drops