Pentane and Toluene Insoluble's

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Hello everyone,

A very interesting case study

http://www.practicingoilanalysis.com/article_detail.asp...ookgroup=OilAnalysis

I have a question: when we conduct a pentane and toluene insoluble test (ASTM D 893- find attached) do we get only Soot% (as given in case) or all insoluble. Basically I want to know what elements (soot, wear metal etc.) consist of pentane and toluene insolubles.

Regards
Mohit

10/5/062:10 AM

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Original Post

nnkmenonMember

Hi Mohit

The pentane insoluble indicates the organic oxides derived from additive degradation,oil degradation etc.while toluene insoluble indicate wear metals,soot and dust particles.

So it is a mixture of all of the above mentioned substances.So the difference between pentane insoluble and toluene insoluble are not an indicative of soot only.The dust particles really means silica content.So when %of toluene insoluble increases,you must send the sample for wear metal analysis also.

10/8/0611:47 PM

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