Osteryoung-Parry equation

The height of the current peak A/p is proportional to analyte concentration and AE according to the Osteryoung-Parry equation as follows ... 

Since the technique is differential by nature, it is the area under a peak which is proportional to concentration, so the Osteryoung-Parry equation is merely an approximation. This explains why many workers prefer to work with peak area rather than say that peak height is proportional to concentration (equation (6.15)). In fact, there is usually a trade-off between several different experimental factors, which are listed in Table 6.6 below. 

Note that the Ilkovic equation contains a term m, the mercury flowrate, which reflects the growth of the drop during the measurement process. In contrast the Parry-Osteryoung equation contains a term A for the surface area of the electrode as if this were a constant. A is for practical purposes a constant since the growth of the drop is negligible during the very short pulse. 

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