試題詳解

27. The Kjeldahl digestion is a method for the quantitative determination of nitrogen contained in organic samples. Firstly the sample is oxidized by concentrated sulfuric acid at high temperature, and then the N-containing products are separated from other products and quantized. Which of the following sets of substances are produced in the oxidation reaction?
(A) CO₂, H₂O, N₂
(B) CO₂, H₂O,
(C) C, H₂O, HNO₃
(D) CxHy, H₂O, CO₂, HNO₃
(E) CxHy, H₂O, CO₂, HCN