Hi V., Bruce M. has tested PPM before and after filtering small particle silver. He measured PPM with a Spec. before and after. You loose some to the filter. I have been trying to find a very fine filter----10 nm pass, which has a positive charge, with no success. My plan, use filtration to confirm max particle size.
James Osbourne, Holmes [email protected] -----Original Message----- From: Victoria Welch [SMTP:[email protected]] Sent: Wednesday, August 25, 1999 4:04 PM To: [email protected] Subject: CS>Newbie tries new method - report. Goddess knows what I have :-). Hi All, I hope this is something people would like to see! I tried a different way of doing things to do my latest batch of CS. I am not at all sure I have improved on the basic LVDC process... I'm not quite sure what to call this process? LVAC - low voltage alternating current? 40 minutes for a full cycle (plus to minus and back to plus). Essentially what the change I made was to place what is called an H-Bridge into the the basic LVDC circuit I had been using. An "H-Bridge" is an electronic (could be mechanical relays also) construct that reverses the polarity of the voltage and current flow depending on how it is controlled. There are two inputs, ground one of them you get one polarity, remove that ground and apply it to the other and you get the opposite polarity. Instead of manually switching this every 20 minutes (not sure where I got that value, maybe Bob?), I took a BASIC Stamp 1 microcontroller and wrote a program that would accomplish this. The electronics appeared, in initial testing to work flawlessly, but some events at the "end" of the process (I declared a current flow of 3.00 ma to be the "end" of the process). The value was chosen as it was I was getting from the single polarity LVDC method that I had been using with success(? - no PPM values are available, just between 2.5 and 3.0 ma, the finished product *tastes* like CS I had previously purchased). I cleaned my probes on a paper towel as usual and filled the 12oz glass with distilled water and inserted the probes on opposite sides of the glass (2.75"). The probes are .040 wire and run to within 1/8" of the bottom of the glass. The glass is filled to what I would guess would be the 11oz point. Mistakes I made in this: I did not check the initial voltage and resistance at the probes. I *assumed* that since this was essentially LVDC, the resistance value would be within the "normal" range of around 800 ohms initially. The 800 ohm is approximate and is usually somewhat less than that. Only once was the value noticibly different to date. The voltage had not varied from the supply voltage throughout the basic LVDC methods I had used to create previous batches. Initial current flow was identical to the "standard start value" that I have been seeing to date, which was 0.27 ma. The polarity reversed every 20 minutes as desired. Previous LVDC batches took aproximately 1 hour and 30 minutes to reach a current flow of 2.5 ma. The initial current ramp up looked good, with the exception that it appears to have gone MUCH slower to reach a given value. After an hour and a half, the current had only risen to 1.72ma. Another 20 minutes brought me to 2.28 ma. By the time I had reached the 3.00 ma "end" point it was 3 hours. Very slow increase was noted after the 2.72 ma rate was reached (2 hours and 25 minutes). I did notice some degree of decrease somewhere around .13 ma at one point, but I could have shaken the table. One other observation that was noted was that the voltage on the probes decreased from the supply value. The supply measured 26.2 volts throughout the process. I first noticed the decrease at the 2.5 hour mark where the voltage at the probes had decreased to 23.3 volts (+/-0.2v). The voltage continued to decrease down to 20.0 volts by the time I reached the 3.0 ma flow. I am completely unsure why this happened. The supply voltage for the electronics remained stable at 9.0 volts throughout the process and control voltages were well within tolerances. Final resistance was ~400 ohms measured at end of process and over time it stabilized at 109 ohms. Visual observations: I am not sure when this started occuring, but small whitish flakes gathered around ONLY one of the probes (at surface around probe) at first. I first noticed this around the 2 hour mark. I was drawing up schematics, documenting code and chatting with a friend so it may well have occured earlier. Both probes look "fuzzy" with obvious dark chunks which break off easily and float to the top mostly, but some fell to the bottom. Around the one probe that the whitish flakes started appearing on (later a smaller amount seemed to gather at the other probe) had deposits under the probe (bottom of glass) that were a medium grey with whitish edges that look quite similar to some mold I have seen (the glass was clean and rinsed with DW to start with). Under the other probe was a "whitish" deposit that looked sorta like one had poured liquid metal with the note that when looked at closer was powdery. There is no noticible heat being generated, *everything* seems to stay at ambiant temperature. The probe mentioned about did *not* melt :-). Both of the deposits under the probes were not larger than maybe 3/4"x1/4" MAX. and with the exception of clumps, are probably not 1/32" thick. Somewhere about the middle of the process I put the laser through the solution and had a weak but visible tyndal(?) effect - in previous LVDC batches, the solution had to set for a while before the tyndal effect was apparent. There are "sparklies" in the solution but they seem to be smaller if more frequent. After filtering (#4 coffee filter, bleached) there is a stronger tyndal effect than I have seen to date. There are very few "large" sparklies. This batch seems to have the most pronounced tyndal effect I have seen to date. Almost an hour later, the solution is still "crystal clear" with no signs of yellow that I can discern. Having tasted it, it seems to have a distinctive CS flavor. Had I more experience, I might think it was "strong". Any comments or suggestions appreciated! Thanks & take care, Vikki. -- Victoria Welch, WV9K, DoD#-13, Net/Sys/WebAdmin SeaStar.org, vikki.oz.net "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: [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]> -- 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]>
