Application of Infrared Spectroscopy to the Analysis of Inorganic Nitrates. Phase I. Spectra of Inorganic Nitrates in Acetone and the Use of Such Spectra in Analytical Chemistry

摘要

A study was made of the spectra of soluble inorganic nitrates in acetone solution and the use of such spectra in analytical chemistry. The spectra of the soluble nitrates indicate the nitrate peaks in acetone can best be accommodated by a C2v point group assignment and the nitrate groups in the nitrate acetone system are essentially covalent in character. The effect of nitrate on the acetone peaks is briefly discussed. A study was made of the solubilities of anhydrous inorganic nitrates in acetone. The applications of the spectra of inorganic nitrates in acetone to analytical chemistry is discussed. A method is proposed for the determination of calcium in the presence of strontium or barium by treating the nitrates with acetone, filtering off the insoluble strontium or barium nitrates, and measuring the nitrate peak from the calcium nitrate at 824/cm. A similar procedure is also recommended for the determination of lithium in the presence of strontium and barium. (Author)