Determination for Particulate PAH Emission from Direct Injection Diesel Engine

Diesel engines are widely used in variety of vehicles due to its fuel efficiency and low cost compared to the other fuel engines. Even though diesel engine exhaust has less Carbon Monoxide (CO) and Hydrocarbon (HC) than gasoline engine exhaust, it posses considerable amount of Particulate Matter(PM) and Oxides of Nitrogen (NOx). Poly Aromatic Hydrocarbon (PAH) emissions from diesel engines, as a part of Soluble Organic Fraction (SOF) of diesel particulates, are of concern as most of them are carcinogenic. Particulate Matter (PM) and the Soluble Organic Fraction (SOF) of PM as well as PAH emissions were measured for different engine conditions. The sample was collected by using series of water bubblers and condensate traps immersed in an ice -water bath. The soluble organic fraction, which is present in the collected sample was extracted in the soxhlet extraction apparatus. The determination of PAH present in the Soluble Organic Fraction (SOF) was estimated by High performance Thin Layer Chromatography (HPTLC).