«Фараби Әлемі» атты студенттер мен жас ғалымдардың халықаралық конференциясы
IDENTIFICATION OF BIOMARKERS IN CRUDE OIL OF
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| IDENTIFICATION OF BIOMARKERS IN CRUDE OIL OF
KAZAKHSTAN USING GAS CHROMATOGRAPHY – MASS SPECTROMETRY Zhamanbayeva A.B. Scientific supervisor: c.ch.s., Ph.D Alimzhanova M.B. Al-Farabi Kazakh National University aikesha.an@gmail.com Crude oil is a non-renewable source of energy. The importance of crude oil have become the main reason to determine the origin of petroleum, which describes its physical properties and chemical composition, and this knowledge helps to determine the quality of crude oil Biomarkers are one of the most important hydrocarbon groups in crude oil used for chemical fingerprinting. They are complex molecules that have been derived from former living organisms. Biomarkers can be used to fingerprint spilled oils because they have most of the original carbon skeleton which helps to identify the conditions for crude oil’s origin. The origin of crude oil is considered to the main scientific problem nowadays. Crude oil fingerprinting technology is the main method for oil spill identification. In comparison with other hydrocarbons, biomarkers are very resistant to degradation. As all crude oils have their own specific origin under the wide variety of conditions, they may have a unique biomarker fingerprint. Therefore, it is extremely important to analyze biomarkers which may have significant information about crude oil’s origin peculiarities. Gas chromatography is considered to be the most effective method for biomarkers analysis because it provides good separation of complex compounds while mass- spectrometry detector allows to identify these compounds within the sample. The aim of this research work was to identify biomarkers that crude oils contain. In accordance with the aim, crude oils from Western and Southern Kazakhstan were analyzed. Before the analysis they were fractionated using column chromatography into two fractions: saturated and aromatic. Analysis was provided by gas chromatography with mass-spectrometry: During this research work biomarkers such as hopanes, bisnorhopanes, isocopalanes, pregnane, androstane, androstane, (5β)-allopregnane, D- homopregnane, (5α)-cholestane, stigmastane were found in crude oils. For all crude oils Pr/Ph and Pr/C17 ratios, tricyclic/pentacyclicterpanes and hopane ratio, sterane distribution were calculated. According to Pr/C17 and Ph/C18 ratios almost all West Kazakhstan crude oils are resistant to biodegradation. «Фараби Әлемі» атты студенттер мен жас ғалымдардың халықаралық конференциясы 263 жүктеу/скачать 0,93 Mb. Достарыңызбен бөлісу:
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