Ken, I'm sure glad you know how to tell the difference, and left all the good stuff!
And thanks for confirming my figure of a 60% drop in conductivity with your own measurments of 65%. That shows the problem is real and affects everyone. Thanks, Mike Monett Ode Coyote <[email protected]> wrote: > Hogwash deleted. >Ode >At 06:21 AM 5/7/2012 -0400, you wrote: >>Ode Coyote <[email protected]> wrote: >> >>[...] >> >> >No meter will measure "PPM", but the numbers are about the same between a >> >devise that will measure PPM and conductivity readings from a meter that >> >won't at around 10-12 uS =10-12 PPM.....after the conductivity stops >> dropping. >> > >> >The relationship slews off each way in both directions from there a little >> >bit for a good guess and beyond 30 uS, all bets run off into make a wild >> guess. >> > >> >Ode >>If you are seeing a significnt conductivity drop after the brew is >>finished, you have a contamination problem, most likely silver sulfide, or >>severe leaching from your soda-lime glass. This can easily give 60% drop in >>conductivity. If you remove the contamination, the conductivity drop should >>be around 8% or less. >> >>The conductivity of a solution is defined as the reciprocal of the >>resistance of a 1cm cube. The conductivity is directly proportional to the >>number of charge carriers in the solution. This is a linear function over >>the entire range of conductivities we use. >> >>For example, the Hanna HI 7033 Calibration Solution is 84uS/cm at 25C. This >>is a single point calibration, meaning all other measurements fit on a >>straight line down to zero and are a linear function of the conductivity. >> >>For silver and hydroxide ions, the relationship between conductivity and >>ppm is 1uS = 1 ppm, providing you have no contamination. >> >>I did a study long ago that shows this. Note the measurements cover the >>range of 3.3uS to 26uS. Here is the url: >> >>http://silvercentral.org/measure/1us2ppm.htm >> >>There is no reason to expect any deviation above this value, for example in >>the SilverCell process that can easily reach 44uS. >> >>If your measurements indicate the results above 30uS are a "wild guess", >>then there is something seriously wrong with your measurements, or you have >>significant contamination problems, or both. >> >>Since you seem to be insensitive to contamination problems, I would guess >>both. >> >>Thanks, >> >>Mike Monett -- The Silver List is a moderated forum for discussing Colloidal Silver. Rules and Instructions: http://www.silverlist.org Unsubscribe: <mailto:[email protected]?subject=unsubscribe> Archives: http://www.mail-archive.com/[email protected]/maillist.html Off-Topic discussions: <mailto:[email protected]> List Owner: Mike Devour <mailto:[email protected]>
