There is Lugol's 5 % solution with 5 g of pure iodine and 7.5 g of potassium iodide.
In one ml there should be 12.5 mg of iodine in sum.
But there are suggestions telling that two drops of this solution contains 12.5 mg of iodine and the drops I seen used there are no way 1 ml.
Is it a mistake? Why they don't use measurement in ml rather than drops to be precise?
