The effect of instrumental parameters such as pulse height (H step) and scan rate on the sensitivity of BPR determination was also checked. Fig. 3A illustrates the effect of H step on the electrochemical response of BPR at CPE. As shown, themaximumpeak currentwas obtained at an H step of 0.01 V and after that the peak current of BPR is almost independent of H step. Therefore, this value was applied for the determination of BPR in this work.