geo78 wrote:need to convert 15ppb of Au (Gold) to g/t (grams/ton). Any ideas?
15 ppb = 15/1,000,000,000.
1 tonne = 1,000 kg. 1,000 kg = 1,000,000 grams.
So...
15 parts / 1,000,000,000 parts = 0.015 grams / 1,000,000 grams
and finally...
0.015 grams / 1,000,000 grams = 0.015 grams / tonne