Hi Trem, when I read the thread I saw that uS was what was being measured, no mention of one of your meters was there, so naturally assumed a TDS meter was being referred to. Your meter is something new to me, though I think my method would still be vastly more accurate. http://www.silvergen.com/ppm_meter.htm If I wanted 10ppm then 12ppm or 8 ppm would be acceptable from your meter I suppose, though my equipment was designed to be able to reproduce exact ppm values repeatedly, accepting a little wearage on the electrodes. I see your equipment will be very useful to measure ppm after the sol has been made, in providing a relatively narrow bandwidth of values to calibrate equipment with (though most suggestions I see for silver sol making equipment with repeatable ppm values, and their instructions for using it are hopelessly inadequate for this purpose. Dave On Fri, Jan 13, 2012 at 2:20 PM, MaryAnn Helland <[email protected]>wrote:
> Dumb question -- is the Hanna Tester a uS meter? > MA > > ------------------------------ > *From:* Trem <[email protected]> > *To:* [email protected] > *Sent:* Thu, January 12, 2012 7:55:17 PM > > *Subject:* Re: CS>PPM vs uS > > Wrong D Glover! uS meters are very close to spot on. We had samples > analyzed about ten years ago and made the correlation at that time and > started telling about it. We have been selling the PWT meters ever since > for that purpose. > > TDS meters are not useful otfher than reading about half the PPM and not > giving much info about the water purity. They're the equivalent of litmus > paper. > > Trem > > > > > ----- Original Message ----- > *From:* D Glover <[email protected]> > *To:* [email protected] > *Sent:* Thursday, January 12, 2012 12:40 PM > *Subject:* Re: CS>PPM vs uS > > Asif, don't waste your time with uS meters except for testing the purity > of your water, as they were only designed for that purpose, and nothing > more, they cannot in any way measure ionic content of silver sol or be used > to infer any value for ppm of silver ions in a sol through extrapolation > by some mathematical means. No matter how you play with maths you will not > get a proper answer. Rather, standardize your method of manufacture (for > some tips please see my essay on the manufacture of silver sols at > Mothman777's Blog') > Make some 20 ml specimens and submit those to a professional lab > (university labs are cheapest), they will dissolve all the clusters of ions > into single ions with the addition of nitric acid, then a fine vapour of > this is aspirated under pressure into an argon plasma flame at a high > temperature and the colour of the spectrum will tell you accurately what > you have made, but bear in mind that 10 ppm might all be in a small number > of a few thousand clusters (for example) or might be in trillions of > clusters. > > On Thu, Jan 12, 2012 at 9:47 AM, Asif Nathekar > <[email protected]>wrote: > >> Hi, >> >> I have been doing some more reading which has got me looking for a >> resolution, namely what uS do you consider to roughly figure out the PPM. >> I know the reason why a typical ppm or uS meter would not give a reading >> due to the ions which we do want to measure not being very measurable in >> terms in electrical conductance. >> But it there a rough method to measure from the stuff that does conduct. >> What I am therefore asking is if my uS meter says 10 uS what ppm of CS >> should I consider that to be. >> I have so far been halving the value so that I would have said that was >> 5 ppm. This was from information I received from other posts. >> Kindly help shed some light in this matter for me. >> Cheers >> Peace to all >> Asif. >> >> >> >> -- >> The Silver List is a moderated forum for discussing Colloidal Silver. >> Rules and Instructions: http://www.silverlist.org/ >> >> >> Unsubscribe: >> <mailto:[email protected]?subjectunsubscribe> >> Archives: >> http://www.mail-archive.com/[email protected]/maillist.html >> >> Off-Topic discussions: <mailto:[email protected]> >> List Owner: Mike Devour <mailto:[email protected]> >> >> >> >
