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Solvent selection phase splitting

Salts may be split by dissolving in an aqueous-organic solvent mixture and by adjusting the pH to selectively partition the two components into the two phases. [Pg.336]

Cross-polarization in the solution state has been employed for the selective observation of sealar-eoupled quadrupolar nuclei in anisotropic phases. The method has been apphed to a mixture of beryllium fluoride complexes. Despite severe overlap in the Be speetrum, a quadrupolar splitting was observed for BeFs whereas no sueh sphtting was resolved for Bep4 . NMR spectra of C-iodomethane dissolved in thermotropic and lyotropic liquid crystalline solvents have been used to measure and C- H dipolar couplings. From the... [Pg.529]

FIGURE 3.39 Chromatograms illustrating differences in selectivity for components of an industrial solvent mixture with (a) Equity-1 stationary phase (b) SUPELCOWAX stationary phase. In each case column dimensions 30-m x 0.32 mm-i.d., 1.0 (Am tempCT-atnre conditions 35°C (8 min) at4°C/min to 130 C. Det FID, 25 cm/s He, split injection (200 1). (Reprinted with pamission of Supelco, Beliefonte, PA.)... [Pg.155]

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See also in sourсe #XX -- [ Pg.353 ]



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