Quantification of ethanol in petrol-ethanol blends: Use of Reichardt’s ET (30) dye in Introducing a Petrol Batch Independent Calibration Procedure
Publication year: 2012Source:
Keshav Kumar, A.K. Mishra Petroleum fuels are generally non-polar. The presence of ethanol in the petrol-ethanol fuel blends increases the polarity of the fuel blend. It was observed that absorption spectral shift of the Reichardt's E T (30) dye is sensitive to the petrol-ethanol blend polarity. It was also found that E T (30)dye has a characteristic λ max of absorption in petrol-ethanol blends irrespective of the petrol batch with which blends were prepared. In the present work, a sensitive analytical method for the petrol batch independent quantification of ethanol content in petrol-ethanol blends has been developed.
Highlights ► Petrol batch independent ethanol quantification in petrol-ethanol blends was achieved. ► Reichardt's E T (30) dye was found to have characteristic absorbance λ max in petrol-ethanol blends. ► 2nd order polynomial was found to be optimum to explain the transition energy of E T (30) with ethanol concentration. ► Calibration model can be used for the quantification of ethanol in the concentration range of 2 to 30%. ► Statistical parameters show that obtained calibration model is robust.
This is a syndicated post. Read the original at
ScienceDirect Publication: Talanta.