Determination of the Distribution Patterns and Abundances of Trace Elements in Nigerian Crude Oil Using the AAS Technique

2011 ◽  
Vol 5 ◽  
pp. 64-73
Author(s):  
O.D. Nworgu ◽  
O.D. Osahon
Keyword(s):  
Trace Elements ◽  
Crude Oil ◽  
Distribution Patterns ◽  
American Petroleum Institute ◽  
Oil Wells ◽  
Oil Well ◽  
Analytical Technique ◽  
The Mean ◽  
Atomic Absorption Spectrometric

Crude oil samples from four oil wells in Nigeria were analyzed for the following seven trace elements: V, Cr, Mn, Fe, Co, Ni and Pb using Atomic Absorption Spectrometric (AAS) analytical technique. The mean concentrations of these elements on a weight to weight basis were found to range from 0.017 ± 0.005 to 1.977 ± 0.397ppm. The results also show that V was the most abundant metal with Ovia 1 Long String (OLS) Oil well containing the highest concentration of V. The V/Ni ratio from the method used shows that Ovia 1 Long String (OLS) and Ovia 1 Short String (OSS) were the most and the least matured oil wells respectively. All the samples had comparably the same V/Ni ratio (1.16—1.77) implying identical source for all the oils. Furthermore, the calculated values of American Petroleum Institute (°API) gravity determined using the measurement of specific gravity (S.G.) of the crude oil samples range from 47.80 to 55.50. This suggests that the samples fall into one category of crude oil classification which in this case is light crude.

scholarly journals Determination of trace elements in the plants of Mt. Bozdag, Izmir, Turkey

2010 ◽  
Vol 62 (3) ◽  
pp. 731-738 ◽  
Author(s):  
D. Yildiz ◽  
I. Kula ◽  
G. Ay ◽  
S. Baslar ◽  
Y. Dogan
Keyword(s):  
Trace Elements ◽  
Woody Plants ◽  
Statistical Significance ◽  
Absorption Spectrometry ◽  
Dry Weight ◽  
Current Level ◽  
The Mean ◽  
Herbaceous And Woody Plants ◽  
Made In

The aim of this study was to determine the current level of atmospheric heavy metal content on the Bozdag Mountain of the Aegean Region, Turkey. Twenty nine different plants were selected to study their potential as biomonitors of trace elements such as Ni, Zn, Fe, Pb, Mn and Cd (?g g-1, dry weight). The samples were collected from two different altitudes of Mt. Bozdag. The concentrations of trace elements were determined by atomic absorption spectrometry. The mean concentrations determined at 1000 m altitude ranged from 0.025 to 1.609, 0.232 to 0.731, 0.578 to 5.983, 0.287 to 0.565 and 0.176 to 2.659 (?g g-1, dry weight), for Ni, Zn, Fe, Pb and Mn, respectively. At the altitude of 1600 m, the values ranged from 0.023 to 0.939, 0.258 to 1.254, 0.839 to 5.176, 0.301 to 1.341 and 0.405 to 3.351 (?g g-1, dry weight) for Ni, Zn, Fe, Pb and Mn, respectively. No Cd was detected at either altitude. Statistical significance was determined by the independent sample t-test and comparisons were made in order to determine if there were any differences between the averages of herbaceous and woody plants. .

The determination of trace elements in crude oil and its heavy fractions by atomic spectrometry

2007 ◽  
Vol 62 (9) ◽  
pp. 939-951 ◽  
Author(s):  
Christiane Duyck ◽  
Norbert Miekeley ◽  
Carmem L. Porto da Silveira ◽  
Ricardo Q. Aucélio ◽  
Reinaldo C. Campos ◽  
...  
Keyword(s):  
Trace Elements ◽  
Crude Oil ◽  
Atomic Spectrometry ◽  
Heavy Fractions

Electrothermal Atomic Absorption Spectrometric Determination of Selenium in Foods and Diets

1983 ◽  
Vol 66 (5) ◽  
pp. 1129-1135 ◽  
Author(s):  
Jorma Kumpulainen ◽  
Anna-Maria Raittila ◽  
Jari Lehto ◽  
Pekka Koivistoinen
Keyword(s):  
Atomic Absorption ◽  
Collaborative Study ◽  
Hydride Generation ◽  
Bovine Liver ◽  
Pyrrolidine Dithiocarbamate ◽  
Matrix Modifier ◽  
Organic Extraction ◽  
The Mean ◽  
Atomic Absorption Spectrometric

Abstract The validity of 2 electrothermal atomic absorption spectrometric methods for determination of selenium in foods and diets was tested. By using 0.5% Ni(II) as a matrix modifier to prevent selenium losses during the ashing step, it was shown that selenium can be determined in samples containing ≥1 μg Se/g dry wt without organic extraction. The mean recovery tested, using NBS Bovine Liver, was 98%; recovery of added inorganic selenium in Bovine Liver matrix was 100%. In addition, this method gave values closest to the median value of all participating laboratories using hydride generation AAS or the spectrof luorometric method in a collaborative study on high selenium wheat, flour, and toast samples. For samples with concentrations <1 μg Se/g dry wt, separation of selenium from interfering Fe and P ions by organic extraction was necessary. Using inorganic ,5 Se in meat and human milk matrixes, an ammonium pyrrolidine dithiocarbamate-methyl isobutyl ketone- extraction system with added Cu(II) as a matrix modifier yielded the best extraction recoveries, 97 and %%, respectively. Accuracy and precision of the method were tested using several official and unofficial biological standard materials. The mean accuracy was within 4% of the certified or best values of the standard materials and the day-to-day variation was 9%. The Se/Fe or Se/P interference limits proved to be low enough not to affect selenium determinations in practically all foods or diets. The practical detection limit of the method was 3 ng Se/g dry wt for 1.0 g dry wt samples. Approximately 20 duplicate determinations can be performed per day. In terms of sensitivity, accuracy, precision, and sample throughput, the tested method compares favorably with the best methods available.

Determination of Heavy Metals in Damascus Drinking Water Using Total Reflection X-Ray Fluorescence

1999 ◽  
Vol 34 (2) ◽  
pp. 305-316 ◽  
Author(s):  
E.H. Bakraji ◽  
J. Karajo
Keyword(s):  
Trace Elements ◽  
Drinking Water ◽  
Total Reflection ◽  
World Health ◽  
X Ray ◽  
Quality Guidelines ◽  
The World ◽  
The Mean ◽  
Health Organization

Abstract Total reflection X-ray fluorescence spectrometry and chemical preconcentration have been applied for multi-elemental analysis of Damascus drinking water. Water was taken directly from taps of several city sectors and analyzed for the following trace elements: Ti, V, Cr, Fe, Co, Ni, Cu, Zn, Se and Pb. The detection limits were found to be in the range of 0.1 to 0.4 µg/L. The mean levels of trace elements in the Damascus drinking water were below the World Health Organization drinking water quality guidelines.

Critical Review on the Analytical Methods for the Determination of Sulfur and Trace Elements in Crude Oil

2019 ◽  
Vol 50 (2) ◽  
pp. 161-178 ◽  
Author(s):  
M. A. Gab-Allah ◽  
Emad. S. Goda ◽  
A. B. Shehata ◽  
Heba Gamal
Keyword(s):  
Trace Elements ◽  
Crude Oil ◽  
Critical Review ◽  
Analytical Methods

Determination of several trace elements in cassava using nuclear analytical technique

2021 ◽  
Author(s):  
Syukria Kurniawati ◽  
Endah Damastuti ◽  
Diah Dwiana Lestiani ◽  
Natalia Adventini ◽  
Woro Yatu Niken Syahfitri ◽  
...  
Keyword(s):  
Trace Elements ◽  
Analytical Technique ◽  
Nuclear Analytical Technique ◽  
Nuclear Analytical

Laboratory and Field Tests on Titanium for Oil Field Pump and Valve Parts

CORROSION ◽  
1961 ◽  
Vol 17 (11) ◽  
pp. 16-30
Author(s):  
F. W. Jessen ◽  
Ricardo J. Molina
Keyword(s):  
Crude Oil ◽  
Laboratory Tests ◽  
Field Tests ◽  
Oil Wells ◽  
Oil Field ◽  
Lower Price ◽  
Oil Well ◽  
Competitive Disadvantage ◽  
Sour Crude ◽  
Gas Lift

Abstract Laboratory and field tests are reported for titanium parts for gas lift valves and down-hole oil well pumps. While titanium performed well in the laboratory tests using aerated fluids, and did well in field tests of gas lift wells, similar trials in wells pumping sour crude oil well showed titanium to be inferior to normally used materials. Authors conclude titanium is suitable for use in gas lift valves and could be competitive to presently used materials at a lower price. They conclude titanium is not suitable for use in oil well pumps, but might perform better if hardened. It also is at a competitive disadvantage to commonly used materials costwise. While titanium is cathodic to materials commonly used in oil wells, no marked corrosion was attributed to this property after exposure of coupon sets in a producing well. Titanium was found resistant to abrasion by sand-laden aerated oil well fluids in laboratory tests. 6.3.15, 8.4.3

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