3-[N-Bis(hydroxyethyl)amino]-2-hydroxypropanesulfonic acid , 3-双(2-羟乙基)氨基-2-羟基丙磺酸 , 68399-80-4|3-双(2-羟乙基)氨基-2-羟基丙磺酸|生物缓冲液