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The quantitative thin-layer chromatographic determination of zinc dialkyldithiophosphate

โœ Scribed by R.A.G. Marshall

Book ID
104149971
Publisher
Elsevier Science
Year
1974
Weight
141 KB
Volume
56
Category
Article
ISSN
0022-0728

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โœฆ Synopsis

Zinc dialkyldithiophosphates (ZDDP) are widely used as multifunctional oil additives 1-4. Under engine conditions or under laboratory simulations they rapidly break down to give a multiplicity of products. The fate of the ZDDP can be determined after separation from these products and from other additives by paper 5 or thin-layer chromatography 6 (t.l.c.). A quantitative estimation of the subsequent trace quantity of the zinc-derivative has then been made by neutron activation analysis 7 or pyrolysis-gas chromatography 8. The simpler method described here involves elution of the zinc after t.l.c, and its estimation by anodic stripping voltammetry 9. This technique is sufficiently sensitive to detect the zinc contained in a typical 10 pl sample of a 2% ZDDP solution.

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