Abstract
A new method was proposed on the basis of computer-assisted IR spectrometry for the separate determination of aliphatic (Alk) and aromatic (Ar) petroleum products in water samples. The integral intensities of absorption bands were measured with a Fourier-transform IR spectrophotometric complex. A series of individual hydrocarbons and their mixtures was studied, and real water samples were analyzed. The conditions for recording and computer processing of IR spectra were selected. Based on the published data and experimental data obtained using reference samples, optimal regions for recording IR spectra were characterized, and integration intervals were found for characteristic band areas of aromatic and aliphatic hydrocarbons. Regression equations were derived on an assumption that the system is binary. Working coefficients in the Bouguer–Lambert–Beer's law were found. Interval estimates of errors in the proposed method were calculated. Practical recommendations were given.
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