Development of a WD-XRF analysis method of minor and trace elements in liquid petroleum products
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Other documents of the author: Gazulla Barreda, Maria Fernanda; Orduña, Mónica; Vicente, S.; Rodrigo, Marta
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http://dx.doi.org/10.1016/j.fuel.2013.02.049 |
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Title
Development of a WD-XRF analysis method of minor and trace elements in liquid petroleum productsDate
2013Publisher
ElsevierISSN
1873-7153; 0016-2361Bibliographic citation
Fuel Volume 108, June 2013, Pages 247–253Type
info:eu-repo/semantics/articlePublisher version
http://www.sciencedirect.com/science/article/pii/S0016236113001518Subject
Abstract
This paper describes a methodology for the analysis of minor and trace elements in liquid petroleum products, with varying oxygen content between 0% w/w and 3.4% w/w and varying C/H ratio between 7 and 9, by wavelen ... [+]
This paper describes a methodology for the analysis of minor and trace elements in liquid petroleum products, with varying oxygen content between 0% w/w and 3.4% w/w and varying C/H ratio between 7 and 9, by wavelength-dispersive X-ray fluorescence (WD-XRF) spectrometry, necessary to determine the properties that indicate the function and performance of the product in service.
There are a number of standard methods of chemical analysis by WD-XRF, atomic absorption spectrophotometry (AAS) or inductively coupled plasma atomic emission spectrometry (ICP-OES) that apply to one type of petroleum product. However, there is not a standard that applies to any kind of liquid petroleum products in a huge range of concentrations with low detection limits and uncertainties, that allow to control a great number of products in a huge range of concentrations of an elevate number of elements.
In order to obtained a rapid an accurate methodology that allows the analysis of different materials in a huge range of concentrations, a WD-XRF method of measuring a set of elements: Al, Ba, Ca, Cr, Cu, Fe, Mg, Mn, Ni, P, Pb, S, Si, Ti, V and Zn, in a series of liquid petroleum products was developed being fine-tuned by optimising the measurement conditions and calculating the detection and quantification limits. The validation was carried out by using a series of reference materials and the uncertainty of the method was calculated.
The analysis of sulphur was also performed by elemental analysis in addition to WD-XRF and the results obtained by both techniques were compared. The matrix of the different samples analysed and the standards used was also analysed by determining C, H, N and O. [-]
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Fuel, 2013, vol. 108Rights
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