Patterns of elemental excretion in long term balance studies.

摘要: Abstract Duplicate self chosen complete daily diets (including water and beverages) total urinary fecal excreta of two men for a period 50 weeks have been analyzed 22 elements. Although the actual items food drink by these individuals differed considerably variation in elemental intake excretion was quite wide, when considered over this long period, patterns were remarkably similar. For those elements excreted almost entirely urine, ratio amount urine to ingested agrees very well with ICRP-59 values f1, fraction absorbed from gut ingested. other is not valid estimate f1 since reexcretion element into taken account. Estimation amounts strontium calcium which are reexcreted within 24 days after ingestion made study correlation between output previous days. The value strontium, including gut, has estimated as 0.34 accepted 0.3. below value, indicating that there components endogenous continue occur