caa a22 4500 606225803 CHVBK 20210128101149.0 cr unu---uuuuu 210128e20150101xx s 000 0 eng 10.1007/s10553-015-0560-6 doi (NATIONALLICENCE)springer-10.1007/s10553-015-0560-6 Determination of the Degree of Depletion of Dithiophosphate Additives in Motor Oils by Thin-Layer Chromatography [Elektronische Daten] [O. Pugacheva, V. Pugachev] We have determined the optimal conditions for quantitative analysis of dithiophosphate (DTP) additives to oils by thin layer chromatography: the use of chromatographic plates with finely porous sorbents, preliminary cleaning with hexane, elution with hexane-acetone mixtures, detection by an aqueous PdCl2 solution. We have studied the nature of the dependence of the area of the chromatographic spot on the relative additive content and the composition of the eluent (the hexane:acetone volume ratio). We demonstrate the feasibility of quantitative evaluation of the degree of depletion of DTP additives in motor oils by thin layer chromatography. We studied the dynamics of the decrease in DTP additives in two brands of motor oils during use. Springer Science+Business Media New York, 2015 thin layer chromatography nationallicence dithiophosphate additives nationallicence motor oil nationallicence degree of additive depletion nationallicence Pugacheva O. Kemerovo Forensics Laboratory, Kemerovo, Russia aut Pugachev V. Kemerovo State Univerisity, Kemerovo, Russia aut Chemistry and Technology of Fuels and Oils Springer US; http://www.springer-ny.com 50/6(2015-01-01), 533-540 0009-3092 50:6<533 2015 50 10553 https://doi.org/10.1007/s10553-015-0560-6 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10553-015-0560-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pugacheva O. Kemerovo Forensics Laboratory, Kemerovo, Russia aut NATIONALLICENCE 700 1- Pugachev V. Kemerovo State Univerisity, Kemerovo, Russia aut NATIONALLICENCE 773 0- Chemistry and Technology of Fuels and Oils Springer US; http://www.springer-ny.com 50/6(2015-01-01), 533-540 0009-3092 50:6<533 2015 50 10553