8-12ppm would be acceptable for *anyone* wishing to produce 10ppm in the home with LVDC using whatever meter they choose! And I was asked for considerably more than 20ml when I had my lab tests done using AAS. No meter is "hopelessly inadequate" for the home producer, they are a guide to repeatable production levels of silver relative to the individuals methods, means and practices of production in the kitchen, regardless of how inaccurate they may be. ANY meter is better than none for the home producer for the purpose of approximating silver content in what an individual is making. Most home producers have not the means for laboratory analysis so what do they do? Stop making their own and purchase a product just because a ppm is written on the label? A uS or EC meter is the best the punter can do, or a TDS meter and doubling the reading, how accurate does the punter need to be in the scheme of things home produced? In my opinion it's this sort of information that is potentially confusing and misleading for the punter, and will have them thinking they *MAY?* not be producing a good quality product in the home without a laboratory analysis...which is total bunkum and balderdash! If there is nil mud or gravel or other abnormalities observable in their product after days/weeks or months in storage, it's as good as can be made, using a meter of their choosing as a guide! Could you put up laboratory analysis results of 5 consecutive dated batch samples you had tested indicating total silver content for each, and brewed for identical time frames? I'm the voice of an uneducated punter, humour me. N.
Date: Sat, 14 Jan 2012 00:05:13 +0000 Subject: Re: CS>PPM vs uS From: [email protected] To: [email protected] 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 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]>
