StillThinking Posted January 8, 2017 Share Posted January 8, 2017 Hello Everyone- I have been seeking the answer to the following many places on the internet, but am having trouble finding it and am hoping someone here can help. I have 1 gram of gold, the particles of which are 100 nanometers in size. I am trying to find out the following: If I wanted to make a suspension of gold in water so it will turn out to be 100 PPM, how do I go about figuring out how much weight of the gold nanoparticles to add to the water to achieve that PPM rate? Link to comment Share on other sites More sharing options...
Country Boy Posted January 8, 2017 Share Posted January 8, 2017 "Parts per million" isn't a good measure here. I assume you mean each "100 nanometer" piece to be a "part" of gold but what is a "part" of water? You would be better of calculating density in terms of grams of gold per gram of water. Link to comment Share on other sites More sharing options...
Fuzzwood Posted January 8, 2017 Share Posted January 8, 2017 Smells like colloidal gold... Link to comment Share on other sites More sharing options...
StillThinking Posted January 8, 2017 Author Share Posted January 8, 2017 After doing a lot more research, doing all kinds of formulations to do with volume, mass, etc., I think we finally figured out that PPM, being mg/l, is simply weighing the substance and adding it to a liter of water. So if we wanted a 200PPM suspension, we add 200 mg to a liter of water. I think we thought it couldn't possibly be that simple, but I think we were wrong.... it is that simple! Link to comment Share on other sites More sharing options...
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