Date:         Thu, 6 Jun 2013 12:36:04 -0500
Reply-To:     mcneely4@COX.NET
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Dave Mcneely <mcneely4@COX.NET>
Subject:      Re: Silicone in oil analysis
Comments: To: john@lauterbachandassociates.net
Comments: cc: John Lauterbach <john@jhl.mgacoxmail.com>
In-Reply-To:  <1370539673.3789.5.camel@john-MSIBoard>
Content-Type: text/plain; charset=utf-8

---- John Lauterbach <john@jhl.mgacoxmail.com> wrote:
>
> Unless the lab is using very sophisticated instrumentation, it cannot
> tell elemental silicon from silicon dioxide (sand, for example) or
> silicon from other sources such as decomposed silicone sealants.

I am not sure exactly what you mean.  Silicon dioxide contains silicon the element covalently bonded to oxygen.  I am not aware of it existing in nature in elemental form, that is, not combined with any other element as sulfur and oxygen do.  When the lab says "silicon," they SHOULD mean silicon.  It would be understood that it is combined, but they would not be treating silicon the element and silicon dioxide as one and the same thing.  Thus, the concentration listed as silicon should be weight of silicon per unit of weight or volume of sampled material, not weight of silicon dioxide per unit of weight or volume of sampled material.

mcneely

>
> John
>
> On Thu, 2013-06-06 at 11:33 -0500, Dave Mcneely wrote:
>
> > Not silicone (a form of plastic), but silicon, an element found in sand and other minerals, thus the dirt that gets past an air filter.
> >
> > mcneely
> >
> > ---- Timmy Evens <monkey_lips@YAHOO.COM> wrote:
> > > Quick question: why does poor air filtration result in higher levels of silicone in your oil? Where's this silicone coming from?
> > >
> > > Tim
> > >
> > > Sent from Yahoo! Mail on Android
> >
> > --
> > David McNeely
>
>
> --
> John H. Lauterbach, Ph.D., DABT
> Sole Member & Principal, Chemistry & Toxicology
> Lauterbach & Associates, LLC (Georgia Office)
> 211 Old Club Court
> Macon, GA 31210-4708
>
> Tel.    478-474-8818
> Tel.    478-474-3027
> Fax    478-474-0117
> Cell    478-731-2966
>
>
>
>

--
David McNeely