Voltammetric Lead Determination in Aviation Fuel Samples Using a Screen-Printed Gold Electrode and Batch-Injection Analysis

摘要

This work presents the lead determination in aviation (bio)fuels using disposable screen-printed gold electrodes (SPGEs) adapted on a batch-injection cell associated with a micropipette for portable analysis. The method involves injections of 200 mu L of sample or standard solutions at controlled dispensing rate (4.8 mu Ls(-1)) during deposition step (-550mV for 90s), followed by anodic-stripping voltammetry. Either samples treated by sonication or dry-ashing can be analyzed with detection limits of 0.0071 and 0.0008 mu gg(-1) Pb, respectively. A single SPGE can be applied for 60 consecutive measurements (or 120 for samples dry-ashed). The ultrasound-assisted treatment is faster, safer, and easily adapted for on-site analyses, especially considering the portable characteristics of commercially-available potentiostats and batch-injection analysis cell using SPGEs.