Quantitative Analysis of Aqueous NO2(-) and NO3(-) Solutions by Infrared Internal Reflection Spectroscopy

Abstract

Infrared spectra of aqueous NO2(-) and NO3(-) solutions, and of binary mixtures, were recorded using internal reflection techniques and a Fourier transform spectrometer. NO2(-) could be detected at a concentration of 0.02 M, and NO3(-) at 0.001 M. However, NO3(-) also became adsorbed on the Ge prism. After making corrections for adsorption and for overlapping of NO2(-) and NO3(-) bands, it was possible to analyze binary mixtures with concentrations as low as NO3(-) = 0.03 M and NO2(-) = 0.05 M. By adjusting the optics so that the usually totally absorbing water stretching band had a transmittance of about 50%, it was possible to observe N-H and C-H stretching bands of solutes. Dissolved materials cause distortions of the background which may influence qualitative and quantitative observations.

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Document Details

Document Type
Technical Report
Publication Date
Jan 30, 1973
Accession Number
AD0755750

Entities

People

  • M. J. Low
  • R. T. Yang

Organizations

  • New York University

Tags

DTIC Thesaurus Topics

  • Absorption
  • Abstracts
  • Adsorption
  • Aqueous Solutions
  • Chemistry
  • Contractors
  • Distortion
  • Infrared Spectra
  • Liquids
  • Materials
  • Mixtures
  • Optics
  • Reflection
  • Refractive Index
  • Security
  • Spectra
  • Spectroscopy

Readers

  • Applied Combinatorial Optimization and Logic Circuit Design.
  • Quantum Chemistry
  • Spectroscopy.