DIN IEC 60590:1986-09

Applicable to quality control and acceptance testing of oils. Two methods of analyses are given. Infrared spectrophotometrie analysis: This method is recommended as a quality control and acceptance test for mineral insulating oils. It uses the relationship between the absorbance at 1610 cm and the n-d-m analysis to determine the proportion of the total carbon atoms present in aromatic ring structures. The conversion factor derived from this relationship is applicable to oils with a molecular mass in the range 290 to 500 and with an aromatic carbon in the range 1,2 % to 60 %.*Adsorption chromatographie analysis: This method describes the measurement of the percentage by mass of polar compounds and compounds containing at least one aromatic ring per molecule present in low molecular mass mineral insulating oils.