I wish to make serial dilution of a compound (5000ppm stock in 100% DMSO) to concentrations 0.1ppm, 1ppm, 10ppm, 100ppm and 200ppm, but I want keep final DMSO concentration 0.5% in all dilutions and I have no idea how to maintain that.
What is the main component? If it is a macromolecule with a specific size, please describe it completely in terms of molecular weight and other characteristics so that I can explain the process steps.