Thanks for clearing that up Fred. I was taught that the mho (ohm spelled backwards) was the reciprocal of resistance. I hadn't heard of the micro-Siemens/cm before.
Do you check the Tyndall effect after it is filtered? I've been running it through a coffee filter as suggested by others on the list. You're probably right about the specific gravity. I have the instrument that floats in a solution to a depth determined by how "thick" the solution is. PPM probably wouldn't register. I'll try it anyway just for fun. Best wishes, Andy In a message dated 12/10/1999 9:14:27 AM Pacific Standard Time, [email protected] writes: Sorry Andy, never know who is familiar with what - uS/cm referred to micro-Siemens/cm, the common unit of measurement for electrical conductivity, the reciprical of electrical resistivity! For CaCO3 the conversion to PPM is 2uS/cm = 1 PPM. For Cs it is less then 2 but subject to debate, I prefer 1.6uS/PPM. Basically an ohmmeter with conversion but calibrated to compare to a one sq. cm electrode, to measure the conductivity of one cubic cm of the solution. At $50 each and 2% accuracy the TDS meters are a bargain, but get the PWT or pure water tester as that has a lower range and thus is more accurate! For Tyndall, any beam of light is fine, a flashlight or laser pointer is OK but I prefer the flash light as the beam is big enough to see contaminates such as crystals or other larger particles, which will sparkle. You aim for a fog type cloud only, as the finer the particle, the better the product, the more stable and thus longer storage life. Not sure about beer making equipment, but specific gravity would not be measurable with the typical spigmomanometer (spelling?), as you need an accuracy of better then 1 PPM or 0.00001%. [email protected] Andy said: Thanks for responding Fred, I'm confused. Is us/cm the same thing as microseconds/centimeters? Wouldn't that be a time measurement? How can you convert that to PPM? Are TDS meters just ohmmeters that do a conversion or is there more to it than that? How about the "Tyndall affect of "light dispersion"?" Can I measure that with the gizmos that winegrowers use out in the field to measure the sugar content of grape juice? I'm trying to figure this all out on a budget. I have some old beer making equipment. Do you think the specific gravity will tell me anything? I was planing on using my test results for quality control but I am looking forward to hearing the results of your extreme tests. Keep us posted. Best wishes, Andy In a message dated 12/09/1999 6:38:35 PM Pacific Standard Time, [email protected] writes: Welcome Andy, There are a lot of expensive scientific instruments that could be used for the testing but for such extreme limits of testing simple stuff can be used! We use two separate TDS digital meters, as made by Hanna Instruments, which measure in us/cm, which can be translated into PPM. TDS or "total dissolved solids" measures via conductivity, what is in the solution, not settlement , so it would detect agglomeration, settlement, crystallization, plate out, etc. We of course had to bring the solutions back to room temeperature, as the temp. effect is around 1%/degree F and we went from 70 to 212F. We check the Tyndall affect of "light dispersion" when a strong beam of light is shown thru the solution and we can see the beam of light, as if shown thru a fog. A visual color check is also made, against part of the same batch, in the same size jar. The former is good for any time of test, even to check a year later, while the latter being visually subjective can only be relied on for very short term tests, where you can keep some of the batch to compare to! Both of these used together provide a good low budget measure of extreme outside effects such as freezing, heating, strong magnetic fields, strong UV light, etc. (Our UV light test was actually from last year, but 3 weeks at 1/2" away, which would be equivilant to years of bright room light levels. The other important element to consider in simple tests, is to use the extremes, as we did, so any effect would tend to be profound! All of these outside forces definately have an effect, but being so trivial should not be of a concern. There is a possibility these forces could exhibit a profound effect on less "pure a silver colloid", since we tested with the best we could make. I will repeat the tests next week with some low quality product that has been produced with silver salts only (starting with high PPM water) and then some with silver crystals (heavy cloud formation and stringing) and finally some good stuff but with the "sludge" mixed into it. That should cover (guess I snipped................................................................. the extremes of all of the home brew, unmetered stuff. Will report back! Others may wish to run a few of these simple extreme tests on their production, before I get back to it. [email protected] -------------------- Sorry Andy, never know who is familiar with what - uS/cm referred to micro-Siemens/cm, the common unit of measurement for electrical conductivity, the reciprical of electrical resistivity! For CaCO3 the conversion to PPM is 2uS/cm = 1 PPM. For Cs it is less then 2 but subject to debate, I prefer 1.6uS/PPM. Basically an ohmmeter with conversion but calibrated to compare to a one sq. cm electrode, to measure the conductivity of one cubic cm of the solution. At $50each and 2% accuracy the TDS meters are a bargain, but get the PWT or pure water tester as that has a lower range and thus is moreaccurate! For Tyndall, any beam of light is fine, a flashlight or laser pointer isOK but I prefer the flash light as the beam is big enough to seecontaminates such as crystals or other larger particles, which will sparkle. You aimfor a fog type cloud only, as the finer the particle, the better the product,the more stable and thus longer storage life. Not sure about beer making equipment, but specific gravity would notbe measurable with the typical spigmomanometer (spelling?), as you need an accuracy of better then 1 PPM or 0.00001%. [email protected] Andy said: Thanks for responding Fred, I'm confused. Is us/cm the same thing as microseconds/centimeters?Wouldn't that be a time measurement? How can you convert that to PPM? Are TDSmeters just ohmmeters that do a conversion or is there more to it thanthat? How about the "Tyndall affect of "light dispersion"?"Can I measure that with the gizmos that winegrowers use out in the field to measure the sugarcontent of grape juice? I'm trying to figure this all out on a budget. I have some old beer making equipment. Do you think the specific gravitywill tell me anything? I was planing on using my test results for quality control but I amlooking forward to hearing the results of your extreme tests. Keep usposted. Best wishes, Andy In a message dated 12/09/1999 6:38:35 PM Pacific Standard Time, [email protected] writes: Welcome Andy, There are a lot of expensive scientific instruments that could beused for the testing but for such extreme limits of testing simple stuff can beused! We use two separate TDS digital meters, as made by HannaInstruments, which measure in us/cm, which can be translated into PPM. TDS or"total dissolved solids" measures via conductivity, what is in the solution,not settlement , so it would detect agglomeration, settlement, crystallization, plateout, etc. We of course had to bring the solutions back to room temeperature, asthe temp. effect is around 1%/degree F and we went from 70 to 212F. We check the Tyndall affect of "light dispersion" when astrong beam of light is shown thru the solution and we can see the beam of light, as ifshown thru a fog. A visual color check is also made, against part of the samebatch, in the same size jar. The former is good for any time of test, even to check a yearlater, while the latter being visually subjective can only be relied on for veryshort term tests, where you can keep some of the batch to compare to! Both of theseused together provide a good low budget measure of extreme outsideeffects such as freezing, heating, strong magnetic fields, strong UV light,etc. (Our UV light test was actually from last year, but 3 weeks at 1/2"away, which would be equivilant to years of bright room light levels. The other important element to consider in simple tests, is to use the extremes, as we did, so any effect would tend to be profound! Allof these outside forces definately have an effect, but being so trivialshould not be of a concern. There is a possibility these forces could exhibit aprofound effect on less "pure a silver colloid", since we testedwith the best we could make. I will repeat the tests next week with some low qualityproduct that has been produced with silver salts only (starting with high PPMwater) and then some with silver crystals (heavy cloud formation andstringing) and finally some good stuff but with the "sludge" mixed intoit. That should cover & nbsp; (guess Isnipped................................................................. the extremes of all of the home brew, unmetered stuff. Will report back! Others may wish to run a few of these simpleextreme tests on their production, before I get back to it. [email protected] ----------------------- Headers -------------------------------- Return-Path: <[email protected]> Received: from rly-yb02.mx.aol.com (rly-yb02.mail.aol.com [172.18.146.2]) by air-yb01.mail.aol.com (vx) with ESMTP; Fri, 10 Dec 1999 12:14:27 -0500 Received: from mx1.eskimo.com (mx1.eskimo.com [204.122.16.48]) by rly-yb02.mx.aol.com (v66.4) with ESMTP; Fri, 10 Dec 1999 12:13:22 1900 Received: (from smart...@localhost) by mx1.eskimo.com (8.9.1a/8.8.8) id JAA30544; Fri, 10 Dec 1999 09:13:13 -0800 Resent-Date: Fri, 10 Dec 1999 09:13:13 -0800 Message-Id: <[email protected]> X-Sender: [email protected] X-Mailer: QUALCOMM Windows Eudora Pro Version 4.1 Date: Fri, 10 Dec 1999 12:17:39 -0500 To: [email protected] From: Fred <[email protected]> Subject: Re: CS>Electric Blanket / O.T. Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="=====================_77204353==_.ALT" Resent-Message-ID: <"ftBT31.0.4T7.eIJKu"@mx1> Resent-From: [email protected] Reply-To: [email protected] X-Mailing-List: <[email protected]> archive/latest/17513 X-Loop: [email protected] Precedence: list Resent-Sender: [email protected] >> -- 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]>
