url: http://escribe.com/health/thesilverlist/m60050.html Re: CS>Re: $$$ perpectives From: Robert Berger Date: Tue, 10 Jun 2003 19:27:00
> Mike, > With all due respects to your magnificient calculations, but I > will take the readings of my spectrophotometer every time. This is > a commercial test set-up, and it i what the plating industry uses > to measure the silver in the wash water. > As I said at 3 hrs. the PPM was 8.58, and 50 minutes later it was > 39.6. And that is no BULL. The test is color metric and the > difference is great. > To me your salt test is not worth "a pinch of salt." Sorry, but > there are two generally use methodes for measuring ionic silver. > the spectrophotometer and the ISE, and they agree. > I have crossed checked with four other sources and I know that > what I read is correct. > Send me a sample of your material I would like to measure it. > "Ole Bob" The calculation is not difficult, and is taken directly from Bob Lee's post on 11 Apr 1998, based on Faraday's laws of electrolysis. It is basic chemistry, and is used throughout many industries. I have repeated the calculation using Bob's numbers, and get the same answer as he does. The article is repeated several times in the archives, here's the original: url: http://escribe.com/health/thesilverlist/m1659.html How much silver did I drink From: angelina lee Date: Sat, 11 Apr 1998 19:31:27 A copy also appears on the silvermedicine web site: http://www.silvermedicine.org/howmuchsilverdididrink.html Herx used it in his excel spreadsheet: http://www.silvermedicine.org/faradaycalculator.html I will repeat the calculation using Bob's method. Here's the equations: ; Colloidal Silver Calculations Bob Lee's method ; url: http://escribe.com/health/thesilverlist/m1659.html ; Now for 7ma of current for one hr. we have: ; 0.001118 x 25.2 coulombs = 0.028159 gm of silver hrs = 1 ; hours I = 7e-3 ; current in Amperes k = 107.88 / 96500 ; electrochemical equivalent of silver sec = hrs * 3600 ; seconds gm = k * I * sec ; Faraday's equation for electrolysis gm = kIt C = I * sec ; Coulombs Here's the results: C = +25.200000000000000 gm = +0.0281717720207254 hrs = +1.0000000000000000 k = +0.0011179274611399 sec = +3600.0000000000000 Exactly the same number of grams that Bob got. Now all we have to do is convert grams to milligrams, and calculate the ppm for the file you sent. Here's the data: hrs = 3.8 ; hours mnt = 0 ; minutes I = 6.2211842e-3 ; current in Amperes gal = 2 ; number of gallons lt = 3.785 * gal ; litres k = 107.88 / 96500 ; electrochemical equivalent of silver sec = hrs * 3600 + mnt * 60 ; seconds gm = k * I * sec ; Faraday's equation for electrolysis gm = kIt mg = gm * 1000 ; milligrams C = I * sec ; Coulombs ppm = mg / lt ; 1 ppm = 1 mg per liter. Here's the results: C = +85.1057998560000 gal = +2.00000000000000 gm = +0.09514211076129 hrs = +3.80000000000000 I = +0.00622118420000 k = +0.00111792746113 lt = +7.57082000000000 mg = +95.142110761298 mnt = 0.00000000000000 ppm = +12.5669492553380 sec = +13680.0000000000 Same answer as before. This is a huge difference from your numbers. Maybe it has something to do with the way you take the sample for the spectrophotometer. The salt test would show it immediately. If anyone can find a mistake in the calculations, please let me know! Best Regards, Mike Monett -- The silver-list is a moderated forum for discussion of colloidal silver. Instructions for unsubscribing may be found at: http://silverlist.org To post, address your message to: [email protected] Silver-list archive: http://escribe.com/health/thesilverlist/index.html List maintainer: Mike Devour <[email protected]>
