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Clinical Chemistry 14: 610-614, 1968;
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Clinical Chemistry, Vol 14, 610-614, Copyright © 1968 by the American Association for Clinical Chemistry

Stability of dgr-Aminolevulinic Acid and Porphobilinogen in Urine Under Varying Conditions

Irene Bossenmaier 1 and Ruth Cardinal 1

1 University of Minnesota Medical Unit, Northwestern Hospital, Minneapolis, Minn. 55407.

A study was made on the stability of dgr-aminolevulinic acid and porphobilinogen in urine. Data are presented showing that both substances can be preserved in the same sample by adjusting the pH to 6-7 and storing at -20° for periods up to 1 month, or at 4° for periods up to 2 weeks. As previously shown (1), these conditions are also satisfactory for preservation of coproporphyrin.

Submitted on March 21, 1968
Accepted on April 15, 1968






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Copyright © 1968 by the American Association for Clinical Chemistry.