試題詳解

25. The buffers that have wide use are zwitterions. Which of the following substances  NOT   have zwitterionic form?
(A) Potassium chloride (KCl)
(B) N-tris[hydroxymethyl]methyl-2-aminoethane sulfonate (TES)
(C) N-2-hydroxyethylpiperazine-N'-2-ethane sulfonate (HEPES)
(D) 3-[N-morpholino]propane-sulfonic acid (MOPS)