HPLC complete kits of RECIPE serve for the determination of clinical-chemical parameters for Diagnostics, Therapeutic Drug Monitoring (TDM), and Human Biomonitoring (HBM). The category “Diagnostics“ includes endogenous substances that show a specific relationship to pathologically altered metabolic processes. Therefore, these substances can be used as indicators to determine the causal disease. Parameters for TDM are drugs (and drug metabolites) which are measured in order to control the appropriate clinical medication with the respective drug. Parameters for Human Biomonitoring (HBM) serve for the assessment of an occupational or environmental related exposure to harmful substances.