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Clinical Chemistry 10: 606-610, 1964;
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Clinical Chemistry, Vol 10, 606-610, Copyright © 1964 by the American Association for Clinical Chemistry

Tris (hydroxymethyl) Aminomethane as a Standard for Kjeldahl Nitrogen Analysis

F. Lee Rodkey 1

1 Division of Chemistry, U. S. Naval Medical Research Institute, National Naval Medical Center, Bethesda, Md. 20014.

Solutions of tris (hydroxymethyl) aminomethane (Tris) have been shown to be a convenient primary standard for the Kjeldahl analysis. This compound is readily available in analytical reagent grade and has all the desirable properties of a primary standard. It is unnecessary to protect the Tris solution from C02, as any reaction between Tris and this gas cannot be detected by the titrimetric procedures involved.

Submitted on August 19, 1963






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Copyright © 1964 by the American Association for Clinical Chemistry.