Accurate determination of aromatic groups in heavy petroleum fractions using HPLC-UV-DAD

Pasadakis, Nikos; Gaganis, Vassilis; Varotsis, Nikos

doi:10.1016/s0016-2361(00)00082-x

Cited by 24 publications

(12 citation statements)

References 15 publications

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“…The following observation was also made: Due to the very low level of tri+ aromatics, almost at the limit of quantification, it will soon be necessary to develop a method for even lower contents by improving the separation or introducing a more sensitive detector [10,11], or using hyphenated techniques.…”

Section: Discussionmentioning

confidence: 99%

Local round robin test for determination of aromatics in diesel fuels by HPLC

Šegudović¹,

Tomić

Škrobonja³

et al. 2004

J of Separation Science

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Determination of aromatics in diesel fuels by HPLC is covered by European Standard EN 12916 (April 2000). The Standard is based on former standards IP 391/90 and IP 391/95. The method used for measurements is NP HPLC and separation is performed on silica or modified silica columns with RI detection. The precision of the method was checked by determining the repeatability and reproducibility. The content of aromatics was measured in a number of commercial samples. The measurements have been performed in three different laboratories and under different working and instrumental conditions. Satisfactory agreement was established for repeatability and was slightly poorer for reproducibility. The content of polyaromatics is within the tolerance range (IP 590/99) and the content of tricyclic and higher aromatics (tri+) is close to the limit of quantitition in some samples. Clear differences in the content of polycyclic aromatics in domestic diesel and eurodiesel fuels were observed. The results have confirmed the ruggedness and robustness of the measuring method.

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Section: Discussionmentioning

confidence: 99%

Local round robin test for determination of aromatics in diesel fuels by HPLC

Šegudović¹,

Tomić

Škrobonja³

et al. 2004

J of Separation Science

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“…However, HPLC separation has been used to analyze some of the aromatic components of petroleum. HPLC-UV-DAD has been used in the identification of several aromatics from petroleum (Pasadakis et al, 2001), HPLC-UV-RI has been used to separate crude oils (Akhlaq, 1993), normal phase HPLC was used in the separation of coal liquids (Padlo et al, 1996), and normal phase HPLC has been used in the determination of aromatics in seven crude oils (Sarowha et al, 1996). However, since the bulk of petroleum samples are hydrocarbons with little or no absorbance in the ultraviolet portion of the electromagnetic spectrum of light, GC will continue to dominate the analysis of this class of samples.…”

Section: Analysis Of Compound Classesmentioning

confidence: 99%

A review of analytical methods for the identification and quantification of hydrocarbons found in jet propellant 8 and related petroleum based fuels

Gregg

Fisher

Bartlett

2006

Biomedical Chromatography

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Jet propellant 8 (JP-8) is a complex mixture of compounds that varies from batch to batch. Quantification of various compound classes of JP-8, including BTEX, PAHs and VOCs, has been accomplished. Very few papers have tackled total JP-8 quantification because of its complexity. The components in JP-8 tend to co-elute and present at low concentrations, often nondetectable. JP-8 is the major source of chemical exposure for Department of Defense personnel and a potential hazard for civilians and marine animals. Some components of JP-8 have been identified as possible human carcinogens and have been studied extensively. Development of analytical methods to analyze the components of this fuel are essential to measure the extent of exposure, as well as the short-term and long-term exposure in rodents, humans and marine life. To date, JP-8 has been examined in urine, blood, contaminated water and fish tissue. This paper reviews methods currently utilized in the literature for the analysis of JP-8 and its components. This paper also discusses extraction methods and detectors commonly used in JP-8 and hydrocarbon analysis in general. Finally, the effects of exposure and the future of JP-8 and petroleum analysis with respect to human health are discussed.

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“…Compared to the model compounds, a substantial displacement in maximum UV absorption is observed for the peaks associated with the unsaturated HPLC fractions. Possible reasons for such peak shifting include: the presence of aromatic nuclei of different types and mode of linkage, different molecular positioning of heteroatoms as well as type and number of alkyl substituents (Pasadakis et al, 2001). Consequently, based on this comparison, assignment of a specific number of rings to each fraction is tenuous at best.…”

Section: Gas Oil Fraction Products 353mentioning

confidence: 99%

Characterization of a Gas Oil Fraction and Its Hydrotreated Products

Woods

Kung²,

Adjaye

et al. 2004

Petroleum Science and Technology

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In this work we explore the chemistry of a gas oil fraction in the mid-boiling range (433-483 C) and its products after hydrotreating at 375, 385, and 400 C. Each sample was fractionated by high performance liquid chromatography (HPLC) based on the elution times for saturate, mono-, di-, and poly-aromatic standards. The HPLC saturate fraction is practically free of aromatic components. The nominal mono-and di-aromatics fractions differ in that the former has a higher molecular weight and H/C ratio ORDER REPRINTS cbut lower aromaticity and heteroatom content. The H/C atomic ratios, aromaticities, and average structural parameters of the HPLC poly-aromatic subfractions are virtually the same. Regardless of their structural resemblances they differ substantially in their HPLC elution behavior. This can be attributed to the differences in their oxygen and, especially, nitrogen contents. Hydrogenation produced a significantly greater amount of saturate material having a higher H/C ratio than the original feed. A large part of this increase must result from dealkylation, saturation, or opening of aromatic molecules. This mechanism also produced nominally mono-aromatic compounds from the poly-aromatic species originally present. The effect of hydrogenation on heteroatoms was mixed. While the overall amount of nitrogen was reduced, its concentration in the poly-aromatic fractions actually increased. Overall, oxygen concentration in the product was not much affected by hydrogenation, except that its distribution became skewed towards the more easily eluted HPLC front-fractions. Both thiophenic and sulphide sulphur were significantly reduced in all of the separated fractions.

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Accurate determination of aromatic groups in heavy petroleum fractions using HPLC-UV-DAD

Cited by 24 publications

References 15 publications

Local round robin test for determination of aromatics in diesel fuels by HPLC

Local round robin test for determination of aromatics in diesel fuels by HPLC

A review of analytical methods for the identification and quantification of hydrocarbons found in jet propellant 8 and related petroleum based fuels

Characterization of a Gas Oil Fraction and Its Hydrotreated Products

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