Abstract
Nitrogen in an organic compound is determined by decomposing the sample in a sealed tube with sulphuric acid and passing the digest through two columns of anion-exchange resin, placed one above the other. The upper column contains the resin in the hydroxide form and the lower column in the iodide form. Hence, the ammonium sulphate in the digest is converted to ammonium iodide, which is determined by the Leipert amplification procedure.
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