Certification of a Standard Reference Material for Organics in Crude Oil

摘要

The objective of this program was to provide a complex matrix Standard Reference Material (SRM) certified for the concentrations of selected toxic organic compounds. This SRM will be useful in the chemical characterization and quality assurance efforts and methods development research of laboratories involved in the organic compound characterization of fuels. A petroleum crude oil (Wilmington crude) was selected as the matrix to be used in this effort. This material, when certified, will serve as a companion to SRM 1580, Organics in Shale Oil, that was certified in 1980 with Department of Energy support. The use of both SRM's will provide researchers with two points of calibration for analyses of compounds that are certified in both materials. In general, the certification of SRM's is accomplished through utilization of at least two totally independent techniques of analysis. In order for a parameter to be certified, the results of analyses by these independent methods must agree. The degree of agreement is specified as the uncertainty on the Certificate of Analysis. We have determined the concentrations of dibenzothiophene, phenol, o-cresol, and six polycyclic aromatic hydrocarbons by two independent analytical procedures each. Carbazole and benzo(e)pyrene were determined by electron impact gas chromatography/mass spectrometry (GC/MS) only. A summary of all results to date appears in the table appended to this report. (ERA citation 11:008309)