Composition of N – Alkanes and Polynuclear Aromatic Hydrocarbons in Jatropha curcas Seed Oil from Different Locations

2013 ◽  
Vol 824 ◽  
pp. 311-317
Author(s):  
E.T. Akhihiero ◽  
E.O. Aluyor ◽  
T.O.K. Audu
Keyword(s):  
Gas Chromatography ◽  
Aromatic Hydrocarbons ◽  
Jatropha Curcas ◽  
Seed Oil ◽  
Polynuclear Aromatic Hydrocarbons ◽  
Polynuclear Aromatic Hydrocarbon ◽  
Ionization Detector ◽  
Flame Ionization ◽  
Hydrocarbon Content ◽  
Edo State

The hydrocarbon content of Jatropha curcas seed oil obtained from Oleh Community in Delta State, NIFOR farm in Edo State and Ikabigbo in Edo State represented as samples X, Y and Z respectively were investigated using Gas Chromatography with flame ionization detector. The predominant alkanes found in the oil samples are n-Eicosane (C20H42) and n-Docosane (C22H46), while the major polynuclear aromatic hydrocarbon found in the oil samples is chrysene. Sample X has the highest percentage of n-Eicosane (65.72%), sample Y has 35.56% n-Eicosane while sample Z has the lowest n-Eicosane (0.23%). Sample Z has the highest percentage of n-Docosane (91.38%), sample Y has 60.11% n-Docosane with sample X being the lowest (22.65%). The percentage of chrysene in sample Y is highest (100%), sample X has 97.47% while sample Z has the lowest percentage of chrysene (44.75%).

scholarly journals Polycyclic Aromatic Hydrocarbon and Metal Concentrations in Imported Canned Maize

2014 ◽  
Vol 3 (1) ◽  
pp. 53 ◽  
Author(s):  
Embbey K Ossai ◽  
Chukwujindu Maxwell Iwegbue ◽  
Elizabeth E. Ajogungbe ◽  
Godswill O Tesi
Keyword(s):  
Gas Chromatography ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Polycyclic Aromatic Hydrocarbon ◽  
Aromatic Hydrocarbon ◽  
Aromatic Hydrocarbons ◽  
Absorption Spectrometry ◽  
Acid Digestion ◽  
Ionization Detector ◽  
Flame Ionization ◽  
Polycyclic Aromatic

Concentrations and profile of polycyclic aromatic hydrocarbons(PAHs) and metals (Cd, Pb, Ni, Cr, Fe and Mn) were determined in selected brands of canned maize in the Nigeria market with a view to providing information on the hazards associated with the consumption of these products. The measurement of the concentrations of PAHs was carried out by using a gas chromatography equipped with flame ionization detector (GC-FID) after extraction by ultra-sonication with acetone/dichloromethane and clean-up. The 16 PAH concentrations varied between 45.1 and 335.7 µg/kg. The concentrations of the indicators for occurrence and effects of PAHs in food varied from 3.6 to 114.5 µg/kg for BaP, 6.4 to 168.2 µg/kg for PAH2, 11.8 to 232.7 µg/kg for PAH4 and 19.4 to 327.3 µg/kg for PAH8. The concentrations of metals were determined by using atomic absorption spectrometry after acid digestion. The concentrations of metals in these samples ranged from

scholarly journals Source and Distribution of Polycyclic Aromatic Hydrocarbons (PAHs) in Water from Mboppi River in Douala–Cameroon

2021 ◽  
Vol 6 (4) ◽  
pp. p1
Author(s):  
JESSIE EKOKA Christelle Solange ◽  
ZE BILO’O Philemon ◽  
KOM REGONNE Raissa ◽  
NGASSOUM Martin Benoit
Keyword(s):  
Gas Chromatography ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Anthropogenic Activities ◽  
Polluted Environment ◽  
Ionization Detector ◽  
Flame Ionization ◽  
Low Concentrations ◽  
Polycyclic Aromatic ◽  
Total Concentrations

Having a source attributed to anthropogenic activities such as incomplete combustion or pyrolysis of organic materials, polycyclic aromatic hydrocarbons are toxic organic pollutants that the ubiquity is no more to be proved. The purpose of this work is to identify and quantify the hydrocarbons pollution of the Mboppi River. Eight (8) samples of water were collected in the river during the dry and the rainy season (4samples for each season). Hydrocarbon fraction was extracted by magnetic agitation of the mixture water/hexane followed by clean-up, fractionation and subsequently, analysis using gas chromatography coupled to a Flame Ionization Detector (GC-FID). Total concentrations of polycyclic aromatic hydrocarbons in the samples were ranged between 196.3-1040.19 µg/L in the river. Polycyclic aromatic hydrocarbons with more than four rings showed the highest concentrations in the river independently from the seasonal variation while the polycyclic aromatic hydrocarbons with 2 or 3 rings were usually present in low concentrations or sometimes undetectable. From the data, it was also possible to conclude that there is predominance of petroleum sources, and essentially closed to the more industrialized areas. Mboppi River can then be considered as being among the most polycyclic aromatic hydrocarbons polluted environment in comparison with some rivers and estuaries.

Survey of Some Market Basket Commodities for Polynuclear Aromatic Hydrocarbon Content

1979 ◽  
Vol 62 (3) ◽  
pp. 615-620
Author(s):  
Frank L Joe ◽  
Emma L Roseboro ◽  
Thomas Fazio
Keyword(s):  
Aromatic Hydrocarbon ◽  
Survey Data ◽  
Aromatic Hydrocarbons ◽  
Polynuclear Aromatic Hydrocarbons ◽  
Polynuclear Aromatic Hydrocarbon ◽  
Market Basket ◽  
Hydrocarbon Content ◽  
Limit Of Quantitation ◽  
Potent Carcinogen ◽  
Regulatory Procedure

Abstract The Food and Drug Administration multicomponent regulatory procedure for determining polynuclear aromatic hydrocarbons in foods was recently used to survey 24 foodstuffs for the presence of these compounds. The procedure has a reliable limit of quantitation of 2 ppb. The potent carcinogen benzo (a) pyrene was detected in only one of the 24 products analyzed, at a level of 3 ppb. Pyrene and/or fluoranthene were found in 19 of the 24 samples examined, at levels ranging from less than 1 ppb to about 75 ppb. A comparison of the recent survey data to that obtained approximately 10 years ago reveals that the types and levels of polynuclear aromatic hydrocarbons found are essentially unchanged.

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