Abstract
Abstract Ultraviolet-absorbing compounds excreted in the urine of normal newborns, infants, and children have been measured by high-pressure anion-exchange chromatography. The chromatograms increased in complexity with increasing age of the subject. Preliminary data indicate that the excretion of pseudouridine and uridine was significantly higher in newborns and infants than in older children and adults. Excretion of hippuric acid was low in the newborn. Excretion of ergothioneine was lower in older children than in newborns, infants, or adults. However, hypoxanthine excretion was constant in all groups.
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