The stability of trace metals suspensions in heavy crudes as determined by neutron activation analysis

Buenafama, H. D.; Lubkowitz, J.A.

doi:10.1007/bf02517235

Cited by 9 publications

(4 citation statements)

References 13 publications

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“…where [X]MF is the computed mineral-free concentration of X and [X]A is the measured concentration of X in extracted component. The data in Table III show that the maltenes have much lower trace element contents than do the asphaltenes, as is the case for conventional crude oils (13,20).…”

Section: Resultsmentioning

confidence: 82%

“…Instrumental neutron activation analysis (INAA) has been used to determine trace elements in crude oils (11)(12)(13) because of its high sensitivity, freedom from matrix effects, and simplicity of sample preparation prior to analysis. The method cannot be applied directly, however, to the analysis of oil-sand 0003-2700/83/0355-0074$01.50/0 bitumen which must be extracted from the impregnated rock.…”

mentioning

confidence: 99%

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Solvent extraction of oil-sand components for determination of trace elements by neutron activation analysis

Jacobs¹,

Filby²

1983

Anal. Chem.

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Section: Resultsmentioning

confidence: 82%

mentioning

confidence: 99%

Solvent extraction of oil-sand components for determination of trace elements by neutron activation analysis

Jacobs¹,

Filby²

1983

Anal. Chem.

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“…A technique for introducing crude oils directly into an ICP mass spectrometer based on the formation of oil-in-water microemulsions and greatly simplifying the determination of trace metals in oil is reported. , Proton-induced X-ray emission (PIXE) analysis was also used for the direct determination of the distributions and abundances of trace metals in crude oils . Buenafama et al applied neutron-activation analysis for the determinations of 17 trace elements in heavy crude oils. Ali et al used atomic absorption in a study of the trace metals of crude oils from the different oil-producing fields of Saudi Arabia.…”

Section: Introductionmentioning

confidence: 99%

Detection of Trace Metals in Asphaltenes Using an Advanced Laser-Induced Breakdown Spectroscopy (LIBS) Technique

Gondal

Siddiqui²,

Nasr

2009

Energy Fuels

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The significance of trace elements in the petroleum industry has increased because of the role of nonhydrocarbon components in the elucidation of the mechanisms of migration and origin of crudes. Determining the amounts of trace elements is also very important in the petroleum industry for refining and processing of crudes and even exploration. In the development of different instrumental analytical techniques for trace elemental analysis of crudes and its products, little attention has been devoted to the broad variation in data because of poor sampling and the proper nature of the matrix. Accurate detection of trace metals in asphaltene samples using conventional methods is not a trivial task. In this work, the determination of 13 trace elements in asphaltenes including Co, Fe, V, Ni, Pb, P, Mo, Ca, Si, Ti, Mn, Cd, and Cu are reported for the first time using an advanced laser-based analytical technique. For this purpose, laser-induced breakdown spectroscopy (LIBS) using a Nd:YAG laser at 1064 nm was employed to determine the concentration of these trace elements present in four asphaltene samples derived from the marketable Saudi Arabian crude oils. The concentration determined with our LIBS setup of different trace metals present in the same samples was also measured using a standard technique, such as inductively coupled plasma (ICP), and results achieved with LIBS are in close agreement with ICP results. The limit of detection for these elements was also determined and reported. This is the first time, to the best of our knowledge, the LIBS technique has been applied for the determination of trace metals in asphaltenes. The unique features of LIBS are no or little sample preparation requirement, fast and rapid analysis, and in situ detection, which are lacking in the conventional analytical techniques.

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“…Although larger samples are required, it is not disadvantageous to use 10-g samples. As a matter of fact, inhomogeneity effects of heavy crudes (3) and the distribution of the metal porphyrinates in several solid phases make it more amenable to use larger weight samples. A more representative sample is taken than in the case of reactor irradiations which require milligram samples.…”

Section: Discussionmentioning

confidence: 99%

Computer controlled system for the automatic neutron activation analysis of vanadium in petroleum with a californium-252 source

Lubkowitz¹,

Buenafama²,

Ferrari³

1980

Anal. Chem.

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The stability of trace metals suspensions in heavy crudes as determined by neutron activation analysis

Cited by 9 publications

References 13 publications

Solvent extraction of oil-sand components for determination of trace elements by neutron activation analysis

Solvent extraction of oil-sand components for determination of trace elements by neutron activation analysis

Detection of Trace Metals in Asphaltenes Using an Advanced Laser-Induced Breakdown Spectroscopy (LIBS) Technique

Computer controlled system for the automatic neutron activation analysis of vanadium in petroleum with a californium-252 source

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