Pri pripravi osnovnih raztopin snovi, ki so slabo topne v vodi, ali za lažje dispergiranje teh snovi v preskusnem mediju se lahko uporabi ultrazvočno dispergiranje, organska topila, emulgatorji ali disperzijska sredstva.
Ultrasonic dispersion, organic solvents, emulsifiers or dispersants may be used as an aid to prepare stock solutions of substances with low aqueous solubility or to help to disperse these substances in the test medium.