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Visser T ; Vuuren D van

17 p in Dutch   1993

Toon Nederlands

English Abstract
The effect of various experimental and instrumental parameters on the quantitative analysis of mineral oil components by means of infrared (IR) spectrometry has been investigated. Standard NEN-methods 6675 en 5733 have been used as starting point. Experiments have been carried out in parallel on a dispersive and a Fourier-Transform infrared spectrometer and results have been compared. The influence of the solvents carbontetrachloride, 1,1,2-trichlorotrifluoroethane (freon-113) and tetrachloroethene on the linearity, reproducability and detection limits have been determined. Factors affecting the analysis appear to be solvent, evaporation effects, pipet-type, cell-type, cell position, instrument-type and optical resolution. Detection limits in freon-113 and carbontetrachloride on the Fourier-Transform instrument are found to be about 0.2 mug/l ; a factor of 3 better than on the dispersive machine. Tetrachloroethene was found to be less suited as a solvent. Recommendations are made to improve the present standard procedures.


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( 1993-08-31 )