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Assessment of the suitability of paper chromatography for quick diagnostics of the operating condition of engine oil

Molenda Jarosław, Wolak Artur, Zając Grzegorz, Cieloch Patrycja, Chudy Dominik

Eksploatacja i Niezawodność

2023

Vol. 25, no. 2

art. no. 162912

Paper chromatography is a method that allows rapid assessment of the condition and identification of fuel, water and soot contaminants in engine oil. The paper contains an analysis of the suitability of rapid paper chromatography for assessing the operating quality of engine oil. It takes into account the comparison of physicochemical parameters by classical methods with the quality of commercial paper chromatography. The presented research allowed verifying the suitability of paper chromatography for laboratory evaluation of engine oil quality. It was found that a more extensive analysis of the oil condition is possible provided that the chromatographic separation time of oil dispensed onto filter paper is increased from 1 minute to 40 minutes. Linear relationships were observed between the surface area of the stain core after 40-minute separation and selected viscosity parameters (e.g. kinematic viscosity measured at 40°C). Based on rapid paper chromatography, it was found that reasonable decisions can be made about the quality of engine oil, and thus about replacement or further use of the oil.

The influence of citric acid and urea on the mobility of metal ions

Brajenović N., Tonković M.

Chemia Analityczna

2003

Vol. 48, No. 1

139-144

The influence of citric acid and urea on the mobility of metal ions (aluminium, copper, iron, lead, manganese and mercury) at pH 3.7; 5.0; 7.0 and 8.5 has been investigated. The model system simulating natural conditions consists of the ascending paper chromatogra-phy of metals in tap water or in 0.01 mol L(-1)' citric acid and urea solution as developer. The chromatographic results indicate that citric acid increases the mobilities of examined metals, while urea has no important effect on the metal ions mobilities.

Badano wpływ kwasu cytrynowego i mocznika na ruchliwość jonów glinu, miedzi, żelaza, ołowiu, manganu i rtęci przy pH 3,7; 5,0; 7,0 i 8,5. Układ modelowy, symulujący warunki naturalne, składał się z wstępującej chromatografii bibułowej oraz faz rozwijających: wody wodociągowej i 0,01 mol L(-1) roztworów kwasu cytrynowego i mocznika. Wyniki uzyskane w warunkach chromatograficznych wskazują, że kwas cytrynowy zwiększa ruchliwość jonów, natomiast mocznik nie wywiera istotnego wpływu na ruchliwość jonów metali.