Thiolacetic acid as a reagent for the determination of the inorganic iron content of certain biological materials

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Abstract
Thiolacetic acid is a suitable reagent for the direct determination of inorganic Fe in biological materials. That the whole of the Fe of the hen''s egg is in the inorganic form has been confirmed; yet it is in such firm combination as to appear to be part of some organic molecule. The inorganic Fe content of human serum is 0.12-0.22 mgm. per 100 ml. and of whole blood 0.93-1.56 mgm. per 100 ml. Normal human urine contains less than 0.01 mgm. of Fe per liter.

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