DETERMINATION OF ETHANOL AS A MAJOR CONSTITUENT IN SAMPLES CONTAIN SURFACTANTS, FRAGRANCES AND OTHER ADDITIVES USING ADSORBENT AND BY REFRACTOMETRIC METHOD

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GHOLAMI ALI; HOSEINI FAHIMEH

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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

DETERMINATION OF ETHANOL AS A MAJOR CONSTITUENT IN SAMPLES CONTAIN SURFACTANTS, FRAGRANCES AND OTHER ADDITIVES USING ADSORBENT AND BY REFRACTOMETRIC METHOD

Author(s)

GHOLAMI ALI | HOSEINI FAHIMEH | Issue Writer Certificate

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Abstract

ETHANOL USES AS A MAJOR CONSTITUENT IN THE SOLVENT-BASED CLEANERS AND INCREASES THE CLEANING POWER OF THE PRODUCT. ALSO, IT CAUSES MORE STABILITY OF NON-POLAR COMPONENTS OF THE CLEANER SUCH AS ESSENCES AND FATTY ALCOHOLS IN THE AQUEOUS MEDIUM. THEREFORE, DETERMINATION OF ETHANOL CONTENTS IN THE SOLVENT-BASED CLEANERS IS IMPORTANT FOR EVALUATING QUALITY AND DETECTING ADULTERATION [1]. THE COMMON ANALYTICAL METHODS FOR MEASURING OF ETHANOL IN THE SOLVENT-BASED CLEANERS ARE GAS CHROMATOGRAPHY AND ALCOHOLOMETRY [2].IN THIS STUDY, THE ETHANOL CONTENTS IN A SPECIFIC SOLVENT-BASED CLEANER WERE DETECTED BY REFRACTOMETRIC METHOD USING A SIMPLE INSTRUMENT. THE SAMPLES CONTAINING DIFFERENT CONCENTRATION OF ETHANOL (BETWEEN 5-20 WT%), 0.35 WT% OF SURFACTANTS, 0.1 WT% ESSENCE AND OTHER ADDITIVES PASSED THROUGH THE COLUMN PACKED WITH ACTIVATED CARBON LARGE PARTICLES THAT WAS SATURATED WITH ETHANOL. SO, ALL COMPONENTS OF THE CLEANER EXCEPT FROM ETHANOL ADSORBED BY ACTIVATED CARBON.FINALLY, THE ETHANOL CONCENTRATION IN THE SAMPLE WAS DETERMINED BY COMPARING REFRACTIVE INDEX OF OUTPUT ETHANOL FROM THE COLUMN WITH CALIBRATED CURVE WHICH IS REFRACTIVE INDEX OF ETHANOL ON THE BASIS OF WT% OF ETHANOL AT 25OC (FIG.1).10 CM3 OF ADSORBENT AND FLOW RATE OF 1.2 ML/MIN FOR PASSING THE SAMPLE USED AS OPTIMIZED CONDITIONS FOR COLUMN. THE RESULTS FROM ALL THREE METHODS (GAS CHROMATOGRAPHY, ALCOHOLOMETRY AND REFRACTOMETRY) ARE CRITICALLY EVALUATED AND THEIR IMPACT FOR STUDIES OF AUTHENTICITY IS DISCUSSED. THE REFRACTOMETRIC METHOD IS SIMPLER THAN GAS CHROMATOGRAPHY AND HAS PROPER ACCURACY IN COMPARISON WITH ALCOHOLOMETRY.

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APA: Copy

GHOLAMI, ALI, & HOSEINI, FAHIMEH. (2014). DETERMINATION OF ETHANOL AS A MAJOR CONSTITUENT IN SAMPLES CONTAIN SURFACTANTS, FRAGRANCES AND OTHER ADDITIVES USING ADSORBENT AND BY REFRACTOMETRIC METHOD. IRANIAN SEMINAR OF ANALYTICAL CHEMISTRY. SID. https://sid.ir/paper/912917/en

Vancouver: Copy

GHOLAMI ALI, HOSEINI FAHIMEH. DETERMINATION OF ETHANOL AS A MAJOR CONSTITUENT IN SAMPLES CONTAIN SURFACTANTS, FRAGRANCES AND OTHER ADDITIVES USING ADSORBENT AND BY REFRACTOMETRIC METHOD. 2014. Available from: https://sid.ir/paper/912917/en

IEEE: Copy

ALI GHOLAMI, and FAHIMEH HOSEINI, “DETERMINATION OF ETHANOL AS A MAJOR CONSTITUENT IN SAMPLES CONTAIN SURFACTANTS, FRAGRANCES AND OTHER ADDITIVES USING ADSORBENT AND BY REFRACTOMETRIC METHOD,” presented at the IRANIAN SEMINAR OF ANALYTICAL CHEMISTRY. 2014, [Online]. Available: https://sid.ir/paper/912917/en

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