Hi System Goddess, Measuring PPM of silver sol with a conductivity meter is tricky, if not impossible. Ask Bob B. for his test data. It is damn near random.
Mike D. says if you do a proper calibration procedure, it can be a usable check. I don't really know. Bruce M. says it may sometimes show correlation, but is mostly useless. I use a conductivity meter---which also outputs in mS to measure start water purity only. I measure mg/L---which is PPM--- of the sol I make with a color transmittance spectrophotometer. mS, when measuring a specific solute, will tell you the PPM[mg/L] . I do not think it is useful to measure PPM of a sol, because the sol does not behave like a "dissolved monatomic ion". A mS meter is really a very sensitive Ohmmeter which reads out in the inverse of Ohms; very small units of conductivity. James Osbourne Holmes a...@trail.com -----Original Message----- From: Victoria Welch [SMTP:vi...@oz.net] Sent: Friday, September 17, 1999 12:24 AM To: silver-list@eskimo.com Subject: CS measurements ?! James and Ian, > [ ... ] > I have become accustomed to using PPM because that is what most everyone on > the list uses. I don't have a direct formula to convert mS to PPM, but I > will get one. My meter displays either. If you have a formula to convert PPM to mS, I would appreciate it if you could pass it along. I now have the Hanna TDS and would like to make it as useful (or potentially so) as possible. > Microsiemens are a measure of conductance; it is the Ohm---unit of > resistance, upside down; the reciprocal or 1/Ohms. [ ... ] Hummm, it might be iteresting to see if my computed resistance will match the TDS value when computed that way. Just a quick computation from some of my data came out to a finished mS of 0.00011626 (1/8601), maybe it doesn't work that way...?!? > Send the water and some of your silver; I will do a PPM test on both the > water and the sol. For a limited control, you could also have Bob Berger > test it. I am, first off, courious as to what you use to get the actual PPM reading. Device, manufacturer, cost, supply costs? thoughts and comments? If you don't mind me asking. This not knowing is driving me to drink (fortunately it is CS I am drinking :). In the process, if you do testing, what are your rates? > Santa Fe > New Mexico Loved the area - hated the economy. The Pojaque(sp?) were a real thrill as well :-/. Got to visit the old governers place down on the square and in general explore the area and thoroughly enjoyed it. What an archeological paradise :)! After a few days there I could breath again :-). Thanks and take care, Vikki. -- Victoria Welch, WV9K, DoD#-13, Net/Sys/WebAdmin SeaStar.org, vikki.oz.net #include <coffee.h> "Walking on water and developing software to specification are easy as long as both are frozen" - Edward V. Berard. Do not unto others, that which you would not have others do unto you. -- 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: silver-list-requ...@eskimo.com -or- silver-digest-requ...@eskimo.com with the word subscribe or unsubscribe in the SUBJECT line. To post, address your message to: silver-list@eskimo.com List maintainer: Mike Devour <mdev...@id.net>
