試卷名稱:110年 - 110台灣聯合大學系統_碩士班招生考試_化學類:分析化學#104554
年份:110年
科目:研究所、轉學考(插大)-分析化學
3. Kjeldahl nitrogen analysis is one of the most widely used methods for the determination of nitrogen in organic substances. Which reaction is not involving in this analysis:
(A) Kjeldahl digestion by H2SO4 and boiling
(B) Neutralization of
(C) NH3 gas reaction with excess standard HCl
(D) Distillation of NH3 into standard NaOH NH3 + HO- → NH4OH
(E) Titration of unreacted HCl H+ OH-→H2O