Abstract: | Abstract An indirect polarographic method is described based on the alprade reaction. The formaldehyde produced is determined by its decrease of the hydroxylamine a-c polarographic wave. Sorbitol, ethanediol, mannitol, ethanolamine, serine and threonine are determined in the range 5 – 30 × 10?6 M while 2.5 – 10 × 10?6 M triethanolamine are determinable. |