title: A new colorimetric method for determining blood lead levels using water-soluble porphyrin.
mesh_terms: D003124:Colorimetry / Q000379:methods; D006801:Humans; D007202:Indicators and Reagents; D007854:Lead / Q000097:blood*; D011166:Porphyrins
chemical_list: D007202:Indicators and Reagents; D011166:Porphyrins; D007854:Lead; C016136:tetraphenylporphine sulfonate