Paper Title
Classification of Gasoline Quality in Aizawl by FTIR-ATR Combined with PCA Multivariate Techniques

Abstract
The transportation of our choices in daily life can have a huge impact on air quality and environment. Air pollution is one of the major concerns now a days especially in large cities of our country. Majority of air pollution is created by motor vehicles; it gives half of carbon monoxide emission. To reduce the carbon monoxide emission and increase the engine performance some additives compounds are added to fuel although it can also affect the quality of gasoline fuel. Among the additive compounds, oxygenator and aromatic compounds are most commonly used for reducing carbon monoxide emission and to increase octane ratings. Apart from these, the adulterations can also affect the quality of gasoline fuel and still remain global worry due to its environmental, health and economic effect. The present work covers the classification of gasoline quality obtained from different filling stations in Aizawl (Mizoram) and some parts outside Aizawl area. The analysis is done by using the Fourier Transform Infra-Red (FTIR)-ATR technique in mid-IR region, the variability of gasoline samples is investigated on Principal Component Analysis (PCA) of Multivariate technique. Spectra of gasoline samples in the region between 650-3200 cm-1 are then divided into three groups and variation based on their quality is obtained using the IR mode assignment. The result indicates that HC chain length, Oxygenate, Toluene and Aromatic contents are the major cause of variation. The discussion of IR mode assignment in the region of 650-3200 cm-1 are also included. Keywords - Fourier Transform Infra-Red (FTIR)-ATR, Principal Component Analysis (PCA), HC Chain Length