Potom se k1 može izračunati iz podataka o apsorpciji s pomoću nelinearne regresije [6].
Parrish (1977), Suitability of sheepshead minnows (Cyprindon variegatus) for life-cycle toxicity tests, In Aquatic Toxicology and Hazard Evaluation (edited by F.L. Mayer a J.L. Hamelink), ASTM STP 634.