Thin-layer chromatographic behaviour and separation of rare earths in silica gel-aqueous alkali metal nitrate systems

1988 ◽  
Vol 332 (7) ◽  
pp. 798-801 ◽  
Author(s):  
Shuji Ninomiya ◽  
Noriko Takeda ◽  
Koji Ishida
Keyword(s):  
Alkali Metal ◽  
Thin Layer ◽  
Silica Gel ◽  
Rare Earths ◽  
Metal Nitrate ◽  
Aqueous Alkali ◽  
Chromatographic Behaviour ◽  
Alkali Metal Nitrate

Interactions in aqueous alkali metal nitrate solutions

1968 ◽  
Vol 46 (6) ◽  
pp. 943-951 ◽  
Author(s):  
D. E. Irish ◽  
A. R. Davis
Keyword(s):  
Alkali Metal ◽  
Metal Nitrate ◽  
Aqueous Alkali ◽  
Nitrate Ion ◽  
Spectral Changes ◽  
Wide Range ◽  
Solvated Ions ◽  
High Concentrations ◽  
Alkali Metal Nitrate ◽  
Nitrate Solutions

Raman (R) and infrared (I) spectra of aqueous alkali metal nitrate solutions have been recorded at 25 °C for a wide range of concentrations. In dilute solution the nitrate ion is perturbed by solvent water; the effects attributed to cations are nonspecific. The solvated nitrate ion generates the following spectrum: 1404 cm−1 (I, R), 1348 cm−1 (I, R), 1049 cm−1 (R), 825 cm−1 (I), 719 cm−1 (I, R). In more concentrated solutions band positions, intensities, and especially half-widths show a marked concentration and cation dependence. Changes in band half-width with concentration have been related to hydrated radii of the cations and are discussed in terms of interaction of solvated ions. For solutions of lithium and sodium nitrate more concentrated than 7 M a splitting of the ν4(E′) mode of nitrate ion into components at 720 and 740 cm−1 has been detected. Contact between ions is believed to account for the spectral changes observed for these high concentrations although water is shown to still markedly influence the interaction.

Transfer Properties of Diglycine from Water to Aqueous Alkali Metal Nitrate Solutions

2015 ◽  
Vol 44 (12) ◽  
pp. 2383-2392
Author(s):  
Li Zhou ◽  
Chunli Liu ◽  
Liqun Fan ◽  
Jinhu Wang ◽  
Shumin Wang
Keyword(s):  
Alkali Metal ◽  
Metal Nitrate ◽  
Aqueous Alkali ◽  
Alkali Metal Nitrate ◽  
Transfer Properties ◽  
Nitrate Solutions
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