Reid, All things considered, since you are in Nepal and you are making large quantities of very high ppm CS, I think the easiest and cheapest way of determining the ppm of the solution would be the method recently suggested by Mike Monett to actually weigh the silver anode at the beginning and at the end of production and then calculate the ppm based on the weight of silver lost and the volume of water of the resultant CS.
You should be able to make a large quantity of CS (several runs over a period of time) and combine the resultant brews and come up with enough silver weight loss on the anode to get a faily accurate calculation. Any reasonably sized town in Nepal will have chemists, pharmasists, or labs who would have a tripple beam balance which would probably give enough resolution for this. Just be sure to use the same balance to weigh the before and after weights. I'm sure that Mike or someone on the list would be able to give you formulas with which to make this calculation. Dan PS You lucky guy! I love Nepal... > CS>Re: concentrated CS and low ppm readings- OF THE EARLIER THREAD > > * From: Reid Harvey (view other messages by this author) > * Date: Sun, 5 Oct 2003 01:31:22 > > Dear Ole Bob, Jason, Tony, Marshall, Trem, Everybody > > Thanks for all the helpful points, and I'm still something of a novice > on the CS aspect of ceramic water purifiers. But I have a comment and > question on the need for stirring: my understanding is that sometimes > stirring is not needed, since the flask is kept at about 200oF. > Wouldn't this bring about a kind of thermal stirring, dispersing the > ions? > > Also, checking back in the literature, isn't it true that for CS that's > generated with DC the only accurate procedure in the lab comes from a > spectral analysis? And how does the Hanna PWT do when measuring the > very small particle sizes? Much of what I've seen on list concerns the > way particles get bigger with additional ppm, but doesn't the frequent > polarity reversal keep the particle size down? So in this method of > making concentrated CS I could have a huge percentage of small > particles, of a size that will not be indicated by the Hanna PWT. To > imagine that I'm getting only 2.4 ppm, for this 9:1 solution, with > bright orange color, pearly irredecence and strong TE, seems just > utterly absurd. > > Is it true that for DC generated CS the Hanna device would indicate only > about 10% of true ppm? So if my 9:1 dilute is indicating 2.4 ppm it's > really 24ppm. And my undiluted CS would be more like 240ppm? From what > I'm seeing this kind of concentrated CS is a very different animal by > comparison to the 10 to 20 ppm CS. I would be highly appreciative if > someone could suggest a different kind of regime for testing ppm, ionic, > particulate or whatever, CS of this very particular variety. This > regime would be especially necessary to small cities, where the lab > resources may be a bit limited. > As usual you guys are an indespensible lifeline. > Reid > > Ole Bob said: > Hi Reid, > > When I introduced polarity switching about 5 years ago I did a study on > swithing times but always with a 50% duty cycle. I started with 12 x 12 > sec > and advanced to 120 x 120 sec. I found that the 60 x 60 was the best > comprise. I did sell about a dozen EZCS2 units with motorized stirring. > > When I fist present ed the idae of polarity switching there was > resistance to > it with some saying that I was blowing the oxides or something back into > the > CS, it has become universally used. > > "Ole Bob" > > > > > > > -- -- The silver-list is a moderated forum for discussion of colloidal silver. Instructions for unsubscribing may be found at: http://silverlist.org To post, address your message to: [email protected] Silver-list archive: http://escribe.com/health/thesilverlist/index.html List maintainer: Mike Devour <[email protected]>
