Thanks for the input. So is the following summary accurate?
For Pure water (DH2O) 1ml (cc) of DH20 = 1g of mass ppm = parts per million usually stated as unit mass/unit mass Since pure water is 1g:1ml we can state CS/EIS as a concentration of mass/unit volume For 10 ppm CS/EIS 1ml DH2O has 1 ug of Silver in it or 10mg silver per liter. For 20 ppm CS/EIS 1ml DH2O has 2 ug of Silver in it or 20mg silver per liter. There are 1000ug in a mg and 1000mg in a gram Therefore, if it estimated that it would take 3800mg of silver/day to cause argyria you would have to drink: 380,000 ml or 12,667 ounces or 99 gallons of 10ppm CS/EIS to risk it. OR 190,000 ml or 6,334 ounces or 49.5 gallons of 20ppm CS/EIS to risk it. On 5/23/07, Silver Smith <cag....@gmail.com> wrote:
I was reading some info on Argyria and came across the following statement, "The amount of silver required to develop Argyria is estimated to be 3.8 grams per day" I have two questions about that statement. 1. If you are drinking a 10ppm "concentration" of CS/EIS, how many ounces or milliliters (ml) of the 10ppm CS/EIS would you have to drink to reach the 3.8 grams for a day. 2. How many days would you need to drink it to "get it" (argyria)? I need a bit of help fully understanding what we mean in terms of concentration when we use ppm as the "unit of concentration". I understand that ppm = parts per million. I assume that would be "parts of silver" per some unit of volume (water)? In the clinical lab we measure concentration of analytes in the blood in mg/dl or ug/dl......etc. So would ppm be microgram (ug-1millionth of a gram) per some volume of water? What would the volume of water be? Thanks, SS
