Since uncontaminated natural sediments from a particular source may not be available throughout the year, and indigenous organisms as well as the presence of micropollutants can influence the test, a formulated sediment (also called reconstituted, artificial or synthetic sediment) should preferably be used.
25 ml de chacune des solutions a) à d) sont mélangés et le volume total est ajusté à 1 l avec de l'eau déionisée.