Methods Development for Trace Metal Characterization of Crude Oil by Inductively Coupled Plasma Atomic Emission Spectroscopy.

摘要

This study was done to determine if the sensitivity and accuracy of the ICP analysis could be maintained while using direct injection of diluted oil. The first part of this study included compilation of a list of elements that could be of environmental and operational concern to refinery operators. The list contains not only naturally occurring metals normally considered to be major catalyst and/or product contaminants (i.e. Cu, V, Ni, Fe), but also those elements that may enter the system as a contamination from a source such as an inadequately cleaned tank that was used to transport the oil. The spectral wavelengths used for analyses of these selected elements were chosen by incorporating a scanning technique that identified any cross-element interferences. We were also able to monitor the sensitivity, peak profiles and baseline resolution of these candidate wavelengths. Other factors, such as the effects of viscosity and diluents, were also addressed. 7 refs., 1 fig., 5 tabs.