Chromatographic study of crude oil

2020 ◽  
pp. 47-50
Author(s):  
T.S. Idrisov ◽  
Keyword(s):  
Crude Oil ◽  
Aromatic Compounds ◽  
Petroleum Hydrocarbons ◽  
Chromatographic Analysis ◽  
Scientific Research ◽  
Chromatographic Study ◽  
Column Temperature ◽  
Tof Ms

The paper deals with the methods of preparation of crude oil samples and chromatographic analysis of petroleum hydrocarbons (alkanes, monoaromatic compounds, policyclic aromatic compounds), as well as the results of the analysis (chromatograms of the samples and concentrates of hydrocarbons). The analysis have been carried out on Shimadzu GC 2010-plus and PEGASUS 4D GCxGC TOF-MS chromatographs. In the analysis of alkanes, monoaromatic and policyclic aromatic compounds the column temperature comprised 60−330 оС, 40−120 оС and 70−300 оС correspondingly. Silicagel of 100−200 mehs size was used as a sorbent. Developed methods may be applied for the analytical purposes in petrochemistry and corresponding scientific research surveys as well.

Efficiency and Kinetics of Total Petroleum Hydrocarbons (TPHs) Removal from Crude Oil Polluted Arable Soil using Palm Bunch Ash and Tween 80

2021 ◽  
Author(s):  
Godwin James Udo ◽  
Nnanake-Abasi O. Offiong ◽  
Alfreda Nwadinigwe ◽  
Clement O. Obadimu ◽  
Aniedi E. Nyong ◽  
...  
Keyword(s):  
Crude Oil ◽  
Petroleum Hydrocarbons ◽  
Tween 80 ◽  
Arable Soil ◽  
Total Petroleum Hydrocarbons ◽  
Kinetics Of ◽  
Palm Bunch

THE INFLUENCE OF 17α-METHYL-19-NORTESTOSTERONE (M. N. T.) ON THE METABOLISM OF CORTISOL

1962 ◽  
Vol 39 (1) ◽  
pp. 22-31 ◽  
Author(s):  
A. Vermeulen ◽  
J. Ferin
Keyword(s):  
Urinary Excretion ◽  
Liver Enzyme ◽  
Chromatographic Analysis ◽  
Inactivation Rate ◽  
Chromatographic Study ◽  
List Type ◽  
Cortisol Metabolism ◽  
Enzyme Systems ◽  
Corticosterone Metabolites ◽  
Cortisol Metabolites

ABSTRACT The effect of prolonged 17α-methyl-nortestosterone (M. N. T.) administration on cortisol metabolism was studied in several patients. 1. A decreased urinary excretion of 17-hydroxycorticosteroids occurred regularly. 2. Chromatographic analysis of the urinary corticoids revealed that the decreased urinary excretion involved exclusively cortisol metabolites, whereas corticosterone metabolites were excreted at normal levels. This chromatographic study moreover showed an impairment in the conjugation of tetrahydrocorticoids. 3. Studies with 4-14C-cortisol in MNT treated patients showed increased transcortin levels, a normal cortisol pool, a reduced cortisol inactivation rate and a decreased cortisol production. 4. From these results it is concluded that the decreased 17-hydroxycorticoid excretion reflects a decreased cortisol production, at least partly secondary to a reduced cortisol-inactivation rate, which itself must be attributable either to an inhibition or a defect in the liver enzyme systems concerned in corticoid-inactivation.

Biodegradation of different petroleum hydrocarbons by free and immobilized microbial consortia

2015 ◽  
Vol 17 (12) ◽  
pp. 2022-2033 ◽  
Author(s):  
Tiantian Shen ◽  
Yongrui Pi ◽  
Mutai Bao ◽  
Nana Xu ◽  
Yiming Li ◽  
...  
Keyword(s):  
Crude Oil ◽  
Petroleum Hydrocarbons ◽  
Microbial Consortia ◽  
Biodegradation Rate

The biodegradation rate of crude oil by semi-coke immobilized microbial consortia was higher than that by free microbial consortia.

NOVEL STRAINS OF MICROORGANISMS DEGRADING PETROLEUM HYDROCARBONS

2020 ◽  
pp. 311-313
Author(s):  
N. Tyschenko ◽  
D. Ivasenko ◽  
А. Kosov ◽  
D. Rybkin ◽  
Е. Lukjanova ◽  
...  
Keyword(s):  
Crude Oil ◽  
Bottom Sediments ◽  
Contaminated Soil ◽  
Petroleum Hydrocarbons ◽  
Biological Products

Novel strains of hydrocarbons degrading microorganisms were isolated from oil contaminated soil and bottom sediments and identified. Isolates oxidize components of crude oil in presence of oxygen and can be used as a part of commercial biological products for oil destruction.

scholarly journals Production of CO2 in crude oil bioremediation in clay soil

2005 ◽  
Vol 48 (spe) ◽  
pp. 249-255 ◽  
Author(s):  
Sandro José Baptista ◽  
Magali Christe Cammarota ◽  
Denize Dias de Carvalho Freire
Keyword(s):  
Crude Oil ◽  
Petroleum Hydrocarbons ◽  
Clay Soil ◽  
Fixed Bed ◽  
Bacterial Count ◽  
Fixed Bed Reactor ◽  
Total Petroleum Hydrocarbons ◽  
Co2 Production ◽  
Oil And Grease ◽  
Before And After

The aim of the present work was to evaluate the biodegradation of petroleum hydrocarbons in clay soil a 45-days experiment. The experiment was conducted using an aerobic fixed bed reactor, containing 300g of contaminated soil at room temperature with an air rate of 6 L/h. The growth medium was supplemented with 2.5% (w/w) (NH4)2SO4 and 0.035% (w/w) KH2PO4. Biodegradation of the crude oil in the contaminated clay soil was monitored by measuring CO2 production and removal of organic matter (OM), oil and grease (OandG), and total petroleum hydrocarbons (TPH), measured before and after the 45-days experiment, together with total heterotrophic and hydrocarbon-degrading bacterial count. The best removals of OM (50%), OandG (37%) and TPH (45%) were obtained in the bioreactors in which the highest CO2 production was achieved.

Toxicity Assessment of Groundwater Contaminated by Petroleum Hydrocarbons at a Well-Characterized, Aged, Crude Oil Release Site

2018 ◽  
Vol 52 (21) ◽  
pp. 12172-12178 ◽  
Author(s):  
Jennifer T. McGuire ◽  
Isabelle M. Cozzarelli ◽  
Barbara A. Bekins ◽  
Hannah Link ◽  
Dalma Martinović-Weigelt
Keyword(s):  
Crude Oil ◽  
Petroleum Hydrocarbons ◽  
Release Site ◽  
Toxicity Assessment

Liquid-chromatographic analysis for methylphenidate (Ritalin) in serum.

1979 ◽  
Vol 25 (3) ◽  
pp. 401-404 ◽  
Author(s):  
S J Soldin ◽  
Y P Chan ◽  
B M Hill ◽  
J M Swanson
Keyword(s):  
Chromatographic Analysis ◽  
High Performance ◽  
Plasma Sample ◽  
Potassium Phosphate ◽  
Internal Standard ◽  
High Performance Liquid Chromatographic ◽  
Column Temperature ◽  
Liquid Chromatographic Method ◽  
Liquid Chromatographic Analysis ◽  
Liquid Chromatographic

Abstract We describe a "high performance" liquid chromatographic method for quantitating methylphenidate in serum. The internal standard, 4,5-diphenylimidazole, and serum or plasma sample are extracted in chloroform, evaporated, and redissolved in 20 mmol/L potassium phosphate (pH 3.5)/high-purity acetonitrile, 80/20 by vol. A centrifuged aliquot is chromatographed on mu-Bondapak C-18 with the phosphate/acetonitrile solvent as mobile phase, a flow rate of 1.6 mL/min, and a column temperature of 40 degrees C. Absorbances are read at 192 nm. This method reliably measures concentrations greater than 20 micrograms/L and has analytical recoveries of 74%.

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