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J Lab Clin Med. 1976 Feb;87(2):362-70.

Direct spectrofluorometry of diluted erythrocytes and plasma: a rapid diagnostic method in primary and secondary porphyrinemias.


Primary and secondary porphyrinemias are characterized by the presence of several porphyrin species in erythrocytes and/or plasma. Acid solvent extraction of porphyrins from natural ligands can preclude observation of significant spectral differences apparent on direct spectrofluorometric examination of porphyrin complexes in tissue. Erythrocytes and hemoglobin-free plasma obtained from 13 patients with erythropoietic, 9 with lead intoxication, 5 with porphyria cutanea tarda, 3 with iron deficiency anemia, 1 with erythropoietic porphyria, and 10 normal persons were simply diluted and analyzed spectrofluorometrically. Characteristic porphyrin-ligand spectral patterns were consistently obtained for each group of specimens, allowing diagnostic application of the data.

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