Investigation of alkali metal and ammonium tetraphenylborates by infrared spectrophotometry.
The infrared spectra of alkali metal and ammonium tetraphenylborates have been studied and an infrared spectrophotometric method developed for the determination of ammonium ions in the form of the tetraphenylborate. The N-H deformation vibration band appearing at 1405 cm(-1) in the spectrum of ammonium tetraphenylborate has been utilized for quantitative evaluation; the tetraphenyl-borates of the alkali metals do not exhibit absorption at this frequency. Thus ammonium ions can be determined as the tetraphenylborate in the presence of alkali metal ions without preliminary separation.
Kiss-Eröss
K
K
Institute for General and Analytical Chemistry, Technical University, Budapest, Hungary.
Erdey
L
L
Buzás
I
I