Peter D.McLennan wrote: > > Hi to all CS'ers, > Can anyone here reveal a reliable & simple test to determine ppm of a CS > solution; > (home made).Is there also a mathematical formula relating current > applied,silver surface area,and reaction time to ppm?All I've heard of > testing is that it is done by > a "backscatter of light"...any comments welcomed. > pete > > --
While Bob Lee gave us an excellent dissertation on the mathematical approach a couple weeks back, too many other variables can come into play to be able to calculate this, from what I can see. Best approach is to get the Hanna Instruments TDS1 meter, and work with it. Callibration or applying an "adjustment factor" to the reading is needed, but I expect Mike Devour to have further details on his website in the near future. <grin> My approach of working at a voltage level where current limiting is unnecessary, and then being able to monitor current rise with a DVM reading mA DC current, to arive at a cutoff point corresponding to a TDS1 reading of 20 PPM every time, is described on my website: The Alternate Health Approaches Forum, Colloidal Silver page: http://web.idirect.com/~showcase/althealth/csilver.htm Note that current readings related to PPM are dependent upon several factors: 1: Applied Voltage 2: Electrode surface area (wetted area) 3: Electrode spacing 4: Temperature of the generator system. If all of the above are the same each time, the PPM will be reproducable from batch to batch run to the same current reading. Bruce -- The silver-list is a moderated forum for discussion of colloidal silver. To join or quit silver-list or silver-digest send an e-mail message to: [email protected] -or- [email protected] with the word subscribe or unsubscribe in the subject: line. To post, address your message to: [email protected] List maintainer: Mike Devour <[email protected]>
