----- Original Message ----- From: "Robert Dohr" <[email protected]>
> Greetings Seekers; > Ivan, our numbers are similar (.59 to .57) but I think you may have them > backwards. No, I don't believe so. The specific conductivity of silver ions is as stated, as can be confirmed by measuring a soluble silver salt such as silver nitrate, taking into account the contributing nitrate factor. The silver exists as single ions in this case. The conductivity seems to increase with particle size. >The instructions from Hanna and what my lab results confirmed was > .59PPM/us. or take the reading in us/cm times .59 to get PPM. In my case > 25.5us/cm = 15 PPM. per lab test. Also the us/cm will drop with time for the > first 10-12 hrs, not rise. This appears to be due to the CS dispersing > throughout the DW. Immediately after making a batch the CS is concentrated > around the ion path between the electrodes. A reading taken at this time will > be high and erratic. After sitting overnite the reading will be lower but > stabile. After this initial dispersion the reading should not change futher. I > have CS that is now several months old that still reads within 1 us/cm of when > it was made. As for accuracy my PWT measures in .1us/cm up to 99.9us/cm. I > calibrate it using a solution from Hanna that measures 84us. It comes in small > pouches that you tear open and insert the meter. Use once and throw away. I make sure my samples are well stirred before measuring. When I generate with less than optimal conditions (3 x 9v batteries etc.) I find the uS reading to be much higher than would otherwise be. > NAMASTE' > Beldohr Good health Ivan. -- 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] Silver-list archive: http://escribe.com/health/thesilverlist/index.html List maintainer: Mike Devour <[email protected]>
