化学学报 ›› 1963, Vol. 29 ›› Issue (1): 1-7.    下一篇

论文

丙烯醛、甲醛和乙醛的极譜研究

董绍俊, 汪尔康   

  1. 中国科学院应用化学研究所
  • 投稿日期:1962-02-26 发布日期:2013-06-03

POLAROGRAPHIC STUDY OF ACROLEIN, FORMALDEHYDE AND ACETALDEHYDE

TUNG SHAO-CHUN, WANG ER-KANG   

  1. Institute of Applied Chemistry, Academia Sinica
  • Received:1962-02-26 Published:2013-06-03

本文报告丙烯醛在乙酸-磷酸锂缓冲溶液中的极谱行为。随溶液pH值的变化,丙烯醛呈现四个极谱波。此可能是由于溶液中有单分子和二聚体两种状态的丙烯醛存在。在氢氧化锂底液中,利用亚硫酸氢钠对醛基和共軛双键的加成作用,抑制丙烯醛的双波;利用亚硫酸氢钠和甲醛的加成反应的可逆性而保存甲醛的波。并选择pH8.2的缓冲溶液为测定丙烯醛和乙醛的适宜条件,和提出在丙烯醛、甲醛和乙醛共存下,分别快速测定的极谱方法。

The polarographic behaviour of acrolein in acetate-phosphate buffer solution has been investigated.Acrolein may give rise up to four polarographic waves in accordance with the pH of solution.These waves might probably be due to the existence of two different forms of acrolein,seemingly its monomer and dimer,in solution.By the addition of sodium bisulphite onto the aldehyde group and the conjugated double bond of acrolein,the reduction waves of acrolein disappeared,while that of formaldehyde still persisted in alkaline solution.In this way,the interference of acrolein on the determination of formaldehyde is eliminated.For the determination of acrolein and acetaldehyde,the buffer solution of pH 8.2 has been found to be suitable.A rapid method for the determination of formaldehyde,acrolein and acetaldehyde in admixtures has also been devised.