determination of the level, concentration, or uptake of a potentially toxic compound and (or) its metabolite(s) in biological samples from an organism (blood, urine, hair, etc.) and the interpretation of the results to estimate the absorbed dose or degree of environmental pollution, potentsiaalselt ohtlike ainete määramine bioloogilistest proovidest (veri, uriin, juuksed jne) ja tulemuste tõlgendamine seoses keskkonna reostusega