Will do an experiment tomorrow to know how much vitamin C is in a bottle of soft drink.
Will use the internal standard method of chromatography.
It states in the instructions that I have to make a solution which has vitamin C and isonicotinic acid in. Both of them have to have concentration of 10 ppm. This solution is my internal standaard.
So, if I understand well, I have a solution of 10 ppm vitamin C and a solution of 10 ppm isonicotinic acid in a flask. How the heck can I calculate the concentration of the solution?