• Total Porphyrins in Urine, Erythrocytes, Plasma, Stool und Dialysate
• Porphyrin-Precursors (ALA und PBG) in Urine.
• HPLC in Urin, Stool, Plasma, Erythrocytes und Dialysate
including Isomeren I und  III-separation
• Fluoreszenzspectrometical analysis in Erythrocytes und Plasma to differentiate between the porphyria-diseases
• Familiy diagnostic
• Enzymatic activities in Erythrocytes/Lymphocytes:
◦ URO-I-Synthase in Erythrocytes (Uroporphyrinogen-I-Synthase)
◦ URO-I-Synthase in Lymphocytes (Uroporphyrinogen-I-Synthase)
◦ URO-D (Uroporphyrinogen-Decarboxylase)
◦ FECH (Ferrochelatase)  
◦ ALA-Dehydratase (Aminolaevulinic-acid-Dehydratase)