Water-organic Solvent Mixtures Research Articles

Ion-exchange resins in non-aqueous solvents—II: Sorption of P-nitroaniline and other weak bases in water-organic solvent mixtures

Sorption of p-nitroaniline and several weak organic bases on macro- and microreticular hydrogen-form resins is reported. The solvents used in the study are mixtures of water and fourteen watermiscible organic solvents. The distribution coefficients change from a large value at pure organic solvent to a minimum value at 80% organic solvent-20% water, then increase again except for the basic solvents where no sorption takes place at high organic solvent concentration. It is suggested that in the vicinity of the minimum D a transition in sorption mechanism takes place. A similar behaviour is observed for several other weak organic bases. The sorption of p-nitroaniline in 80% organic solvent-20% water as a function of time is reported. Mesh size and percentage cross-linking are other variables considered.

Light Scattering Measurements on Proteins in Water-Organic Solvent Mixtures.

Light Scattering Measurements on Proteins in Water-Organic Solvent Mixtures.

A RULE FOR THE CALCULATION OF THE ACTIVITY COEFFICIENTS OF SALTS IN ORGANIC SOLVENT-WATER MIXTURES

Consideration of the properties of systems containing two electrolytes in water and in organic solvent-water mixtures leads to the conclusion that the ratio of the activity coefficients of the electrolytes at a given salt concentration and temperature is constant over a considerably range of composition of the solvent. Therefore, if the activity coefficient of one of the electrolytes is known in the organic solvent-water mixture, that of the second electrolyte may be computed from the activity coefficient ratio determined in aqueous solution. Since the activity coefficient of hydrochloric acid has been determined with high accuracy in many organic solventwater mixtures, the above rule has a wide range of applicability. Comparison of results for lithium sodium, and potassium chlorides computed by the rule is made with those derived from amalgam cell measurements in methanol-water mixtures containing 10 and 20% methanol. The agreement is quite satisfactory.

Non-aqueous solvents in anion-exchange separations

Distribution coefficients are measured for the partition of metal ions between anionexchange resin and organic solvent-water mixtures containing hydrochloric acid. The presence of an organic solvent causes metal ions to be taken up at lower hydrochloric acid concentrations. In many cases, distribution coefficients are significantly higher than in water-hydrochloric acid systems. If other conditions are comparable, the order of distribution coefficients in alcohol-water-hydrochloric acid is: isopropyl > ethyl > methyl alcohol. Column separations of metal ion mixtures can be carried out by eluting with alcohol-water-hydrochloric acid mixtures of different compositions. Successful separations of a number of mixtures are reported.

Establishing Composition of Organic Solvent-Water Mixture in Analytical Precipitations

Establishing Composition of Organic Solvent-Water Mixture in Analytical Precipitations

DIELECTRIC CONSTANTS OF SOME ORGANIC SOLVENT-WATER MIXTURES AT VARIOUS TEMPERATURES

ADVERTISEMENT RETURN TO ISSUEArticleNEXTDIELECTRIC CONSTANTS OF SOME ORGANIC SOLVENT-WATER MIXTURES AT VARIOUS TEMPERATURESGosta AkerlofCite this: J. Am. Chem. Soc. 1932, 54, 11, 4125–4139Publication Date (Print):November 1, 1932Publication History Published online1 May 2002Published inissue 1 November 1932https://doi.org/10.1021/ja01350a001RIGHTS & PERMISSIONSArticle Views7839Altmetric-Citations1049LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (794 KB) Get e-Alerts Get e-Alerts