Direct high sensitive determination of elements in gasoline, kerosene, and mineral oil solutions by inductively coupled plasma atomic emission spectrometry (ICP-AES)

Abstract

Direct ICP-AES analysis of petroleum products, organic solvents and fuels is oftentimes possible only in the mode of radial plasma viewing and requires the use of special sample injection systems, the design of which depends significantly on the physical properties of the sample, in particular, on its volatility and viscosity. Volatile oil fractions and products (naphtha, gasoline), as well as and heavy and viscous oil fractions of and petroleum products (vacuum gas oil, fuel oil, thick lubricating oils) are the most problematic objects of analysis. We consider the possibility of direct analysis of the samples based on gasoline, kerosene and lubricating oils dissolved in kerosene using inductively coupled plasma atomic emission spectrometry (ICP-AES). The possibility of using various configurations of sample injection systems and modes of plasma viewing of vertically located torch for direct analysis of the samples based on kerosene and gasoline is considered. A significant improvement in the sensitivity of determination of the elements in gasoline and kerosene using an axial plasma viewing combined with optimal configurations of sample introduction systems and plasma burning modes is demonstrated.