alanburkholder I don’t think it is the volume increase that needs to be factored as I think it would be a small amount in compasrison to mass which I forgot to include. You did make me realize that I need to account for the mass (weight) of the water in addition to the mass of the cure.
Now when I do that I add the 689.5 grams of cure + 3786 grams of water = 4475 grams total.
Using my previous result of 5.17 grams of nitrite in the 689.5 grams of cure I get this:
5.17 grams nitrite /4475 grams (cure+water) = 0.0012 grams nitrite per gram of cure mix. Multiply that by 1000 grams to get it to kilograms we get 1.2 grams nitrite per kilogram cure which, while closer, is still 10X over what I should be seeing.
Obviously, I am still missing some factor that is giving me this inflated result, i.e., parts per thousand (ppt) versus parts per million (ppm). I’m trying to figure this out because I bought several cures I want to use as a pickle and they all contain different amounts of nitrite concentration.