what?
12 ounces of metallic gold as colloids in 24 ounces of solution (possibly water)?
Sounds like a good golden dream, or something somebody with gold fever would claim, or the gold shark shyster selling the water would claim.
what is the volume of solution and what is the color of the colloidal size of clusters, the weight, or specific gravity of the solution???
I seriously doubt even 1 ounce of gold, possibly in the pennyweights or grams maybe, but even then maybe over speculating the amount of metal in solution?
https://scholarcommons.usf.edu/cgi/viewcontent.cgi?article=4872&context=ujmm
https://nanocomposix.com/pages/nanoparticle-volume-mass-and-concentration#target
Depending on particle size, and volume, and type of solution, Typically, the concentration of gold nanoparticles is limited by the process used to make it, a more realistic expectation is somewhere in the range from 0.01 - 0.2 mg of gold per mL of solution.
1 US fluid ounce = 29.537 milliliters, with 24 US fluid ounces we would be looking at about 710 milliliters of the solution, say we expect a high yield or many large colloidal microscopic particles of metallic clusters gold atoms in solution with say 0.2 milligrams per milliliter of solution, this would give us about 142 milligrams of gold.
we need 1000mg of gold to get a gram of gold, so you would need about 168 fluid ounces of this solution to get a gram of gold (probably the best case).
NaNo particle size in the name should be a clue, the metallic gold is so small we cannot even see them without a microcope in the clear colored solution.
worst case the gold clusters are small in size and number say in the range of 0.01 milligrams of gold per milliliter of solution and you spend money chasing your tail looking for gold.