GAS CHROMATOGHRAPHIC DETERMINATION OF SOME PHENOLIC COMPOUNDS IN FUELS AFTER SIMULTANEOUS DERIVATIZATION AND MICROEXTRACTION

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FARAJZADEH MIR ALI; YADEGHARI ADELEH; KHOSHMARAM LEILA

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Seminar Paper

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Seminar: IRANIAN SEMINAR OF ANALYTICAL CHEMISTRY
Year:2014 | Issue:20

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Title

GAS CHROMATOGHRAPHIC DETERMINATION OF SOME PHENOLIC COMPOUNDS IN FUELS AFTER SIMULTANEOUS DERIVATIZATION AND MICROEXTRACTION

Author(s)

FARAJZADEH MIR ALI | YADEGHARI ADELEH | KHOSHMARAM LEILA | Issue Writer Certificate

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Abstract

PHENOLS ARE FOUND AMONG THE OXYGENATED COMPOUNDS PRESENT IN PETROLEUM. THE INTEREST IN THE DETERMINATION OF PHENOLS IN CRUDE OILS AND FUELS LIES IN THE FACT THAT, UPON STORAGE, PHENOLS AND OTHER POLAR COMPOUNDS PROMOTE DEPOSIT FORMATION, WITH DELETERIOUS EFFECTS FOR FUEL QUALITY AND STABILITY [1]. SEVERAL SAMPLE PREPARATION METHODS HAVE BEEN DEVELOPED FOR THE ANALYSIS OF PHENOLS SUCH AS LIQUID–LIQUID EXTRACTION, SOLID-PHASE MICROEXTRACTION, SUPERCRITICAL-FLUID EXTRACTION, ULTRASONIC EXTRACTION, MICROWAVE-ASSISTED EXTRACTION, AND DISPERSIVE LIQUID–LIQUID MICROEXTRACTION.THE GOAL OF THIS STUDY WAS TO DEVELOP A SIMPLE AND RAPID METHOD FOR ISOLATION, ENRICHMENT, AND DETERMINATION OF PHENOLS IN FUELS BY COMBINATION OF LIQUID-LIQUID EXTRACTION AND AIR-ASSISTED LIQUID-LIQUID MICROEXTRACTION (AALLME) FOLLOWED BY GC-FID DETERMINATION [2]. THIS METHOD CONSIST OF TWO STEPS: (I) EXTRACTION OF PHENOLS FROM FUELS BY BACK EXTRACTION INTO NAOH SOLUTION, AND (II) SIMULTANEOUS DERIVATIZATION AND ENRICHMENT OF PHENOLS WITH DURING AN AALLME PROCEDURE. IN THE SECOND STEP, BUTYLCHLOROFORMATE (AS DERIVATIZATION AGENT) AND TETRACHLORO ETHANE (AS EXTRACTION SOLVENT) WERE TRANSFERRED INTO AQUEOUS SAMPLE SOLUTION IN A CONICAL TEST TUBE. THE MIXTURE WAS REPEATEDLY SUCKED INTO A GLASS SYRINGE AND INJECTED INTO THE TUBE. BY THIS ACTION THE TURBIDITY OF SOLUTION INCREASED MORE AND MORE. AFTER PERFORMING PREDETERMINED CYCLES, THE MIXTURE WAS CENTRIFUGED AND 1 ML OF THE SEDIMENTED PHASE WAS ANALYZED BY GC-FID. THIS TECHNIQUE WAS SUCCESSFULLY APPLIED FOR THE EXTRACTION/PRECONCENTRATION AND DERIVATIZATION OF THE SELECTED PHENOLS FROM DIFFERENT SAMPLES SUCH AS GASOLINE, KEROSENE, GAS OIL, AND ENGINE OIL.UNDER THE OPTIMUM CONDITIONS, ENRICHMENT FACTORS, EXTRACTION RECOVERIES, AND LIMIT OF DETECTION WERE IN THE RANGES OF 568 TO 1128, 70-100%, AND 0.81-2.00 MG L-1, RESPECTIVELY.

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APA: Copy

FARAJZADEH, MIR ALI, YADEGHARI, ADELEH, & KHOSHMARAM, LEILA. (2014). GAS CHROMATOGHRAPHIC DETERMINATION OF SOME PHENOLIC COMPOUNDS IN FUELS AFTER SIMULTANEOUS DERIVATIZATION AND MICROEXTRACTION. IRANIAN SEMINAR OF ANALYTICAL CHEMISTRY. SID. https://sid.ir/paper/913579/en

Vancouver: Copy

FARAJZADEH MIR ALI, YADEGHARI ADELEH, KHOSHMARAM LEILA. GAS CHROMATOGHRAPHIC DETERMINATION OF SOME PHENOLIC COMPOUNDS IN FUELS AFTER SIMULTANEOUS DERIVATIZATION AND MICROEXTRACTION. 2014. Available from: https://sid.ir/paper/913579/en

IEEE: Copy

MIR ALI FARAJZADEH, ADELEH YADEGHARI, and LEILA KHOSHMARAM, “GAS CHROMATOGHRAPHIC DETERMINATION OF SOME PHENOLIC COMPOUNDS IN FUELS AFTER SIMULTANEOUS DERIVATIZATION AND MICROEXTRACTION,” presented at the IRANIAN SEMINAR OF ANALYTICAL CHEMISTRY. 2014, [Online]. Available: https://sid.ir/paper/913579/en

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