Rigaku Publishes New Method for Analysis of S, V, Ni in Crude Oil
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Applied Rigaku Technologies, Inc. has published a new application report that details the analysis of sulfur, vanadium and nickel in crude oil using the Rigaku NEX QC+ energy dispersive X-ray fluorescence (EDXRF) analyzer.
The report includes complete information about sample preparation, method calibration and repeatability.
Sulfur (S), vanadium (V) and nickel (Ni) occur naturally in crude oil, but their concentrations vary depending on the geographical region of the oil deposits.
Vanadium and nickel can taint the refining process during crude oil cracking, thereby making crude oil with low levels of vanadium and nickel advantageous.
In oil fields and off-shore wells, a quick and easy means of screening for vanadium and nickel is essential for characterizing the quality of the crude prior to refining. Applied Rigaku Technologies fulfills such analytical industry requirements with the NEX QC series of EDXRF analyzers.
As detailed in the published report, empirical calibrations were built using a suite of 10 commercially available mineral oil calibration standards, and two calibration standards were measured in 10 repeat analyses to demonstrate precision.
Analysis was performed using the Rigaku NEX QC+ high resolution benchtop EDXRF analyzer, optimized for rapid qualitative and quantitative elemental analysis.
The spectra presented demonstrate the multi-element capability of the NEX QC+ spectrometer for analyzing crude oils and show excellent sensitivity and detection limits for the critical elements.
Fast and simple, the NEX QC+ analyzer provides an ideal tool for monitoring the concentrations of vanadium and nickel in crude, as well as the sulfur content, enabling thorough evaluation of the quality of the refining process.
The results of this study, emphasizing stable samples, proper sample handling and proper calibration techniques, indicate that the Rigaku NEX QC+ EDXRF analyzer can achieve excellent results in monitoring the concentration of sulfur, vanadium and nickel in oil.
