Using inductively-coupled plasma optical emission spectroscopy to optimise the analysis of trace elements in gasoline

摘要

Inductively-coupled plasma (ICP) optical emission spectroscopy was used to optimize the analysis of trace elements in gasoline. A Glass Expansion IsoMist temperature- controlled spray chamber was implemented to reduce the temperature of the spray chamber to -15°C for the purposes of the experiment. The temperature controlled spray chamber was used in conjunction with a glass concentric nebuliser. Standards were prepared by diluting a Conostan S21, 300 mgkg-1, oil-based standard in petroleum ether with 40-60°C boiling range. 15 g of kerosene containing 1 mgkg-1 of yttrium was then added to the solution, giving a total mass of 30 g. The temperature-controlled spray chamber was set to a temperature of -15°C. The sub-array plots for each of the wavelengths were examined to ensure freedom from interference. The results show that spike recoveries for all elements determined were well within acceptable limits of ± 10% of the prepared value of 0.87mgkg, with the exception of boron for which the recovery was high.