Solid phase extraction of tritiated contaminants from tritium-containing waste oils.

A solid phase extraction method for removing polar tritiated contaminants from tritium-containing waste oils has been developed. The composition of the degradation products present in the waste oil was determined. The results indicated that upon exposure to tritium gas, fragment methyl ketones, carboxylic acids, and lactones were the main polar products of the mineral-based oil oxidation.

Application of inverse gas chromatography to the examination of annealing processes of semi-synthetic base oils.

The Flory-Huggins chi1,2infinity parameter and solubility parameter delta2 determined by means of inverse gas chromatography (IGC) were successfully used in the physicochemical characterisation of oxidation products of mineral oil-poly-alpha-olefin mixtures. Application of IGC parameters allows one to examine the changes occurring during three different oxidation procedures: classical oxidation in a stainless steel reactor, in a GC column and separate oxidation of the mixture's components. Changes in chi1,2infinity values reflect the changing affinity of mixtures to different types (dispersive, polar, hydrogen bonding) of intermolecular interactions and their potential miscibility and solubility.

Inverse gas chromatography and other chromatographic techniques in the examination of engine oils.

The emerging market of engine oils consists of a number of products from different viscosity and quality classes. Determination of the base oil used in manufacturing of the final product (engine oil) as well as estimation of mutual miscibility of oils and their solubility could be crucial problems. Inverse gas chromatography and other chromatographic techniques are presented as an interesting and fruitful extension of normalised standard analytical methods used in the oil industry.