Molecular susceptibility. The determination of molar Cotton-Mouton constants at infinite dilution in benzene or cyclohexane

1966 ◽  
Vol 19 (8) ◽  
pp. 1315 ◽  
Author(s):  
RJW Le Fevre ◽  
DSN Murthy
Keyword(s):  
Carbon Tetrachloride ◽  
Infinite Dilution ◽  
Empirical Equations

Reliable measurements of the small incremental Cotton-Mouton constants encountered at low solute concentrations with solutions in which the magnetic birefringences of solute and solvent do not differ widely cannot be made with equipment at present available. Five such systems are examined in this paper. It is shown that the larger incrementa easily observable among stronger solutions can be fitted to empirical equations containing ascending powers of the concentrations and hence estimates of ΔC/w2 as w2 approaches zero become accessible. Values of ∞(mC2) obtained by this device agree reasonably with others directly drawn from much weaker solutions of the same solutes in carbon tetrachloride or cyclohexane, i.e, in media for which C1 = 0.

Molecular susceptibility. The diamagnetic anisotropies of sixteen aromatic molecules at infinite dilution in carbon tetrachloride

1966 ◽  
Vol 19 (2) ◽  
pp. 179 ◽  
Author(s):  
RJW Le Fevre ◽  
DSN Murthy
Keyword(s):  
Carbon Tetrachloride ◽  
Infinite Dilution ◽  
Diamagnetic Susceptibility ◽  
Photometric Method ◽  
Aromatic Molecules ◽  
Visual Technique

A photometric method for the determination of Cotton-Mouton constants of liquids and solutions is introduced. It advantageously replaces the visual technique used previously. Anisotropies of diamagnetic susceptibility are recorded for 16 aromatic molecules, and preliminary estimates drawn therefrom of the apparent longitudinal and transverse susceptibilities of Car-X bonds, where X = halogen, methyl, etc.

Kerr constant-dispersion measurements on benzene and carbon tetrachloride

1968 ◽  
Vol 21 (7) ◽  
pp. 1703 ◽  
Author(s):  
RJW Le Fevre ◽  
SC Solomons
Keyword(s):  
Carbon Tetrachloride ◽  
Kerr Constant ◽  
Empirical Equations ◽  
Kerr Constants

The electric birefringences displayed by the above two liquids have been measured photometrically at wavelengths between 375 and 625 mμ, and Kerr constants Bλ computed relatively to benzene, for which B589 is 0.410 x 10-7 at 25�. Empirical equations connecting Bλ values and refractive indexes with X are developed, and compared in applicability with others from the literature. Data necessary for the determination of molar Kerr constants of coloured solutes in the named solvents are also recorded.

Direct determination of cobalt site preferences inNd2Fe14B at infinite dilution

1989 ◽  
Vol 39 (7) ◽  
pp. 4730-4732 ◽  
Author(s):  
D. H. Ryan ◽  
Z. Altounian ◽  
J. O. Strom-Olsen ◽  
W. B. Muir
Keyword(s):  
Infinite Dilution ◽  
Direct Determination ◽  
Site Preferences

Collaborative Study Using a ZDBT Colorimetric Method for the Determination of Copper in Alcoholic Products

1967 ◽  
Vol 50 (2) ◽  
pp. 334-338
Author(s):  
Duane H Strunk ◽  
A A Andreasen
Keyword(s):  
Sulfuric Acid ◽  
Carbon Tetrachloride ◽  
Collaborative Study ◽  
Colorimetric Method ◽  
Good Precision ◽  
Determination Of Copper

Abstract Results are given on a collaborative study in which a zinc dibenzyldithiocarbamate (ZDBT) colorimetric method is used to measure copper in alcoholic products such as high wine, spirits, gin, whisky, brandy, rum, and wine. In this method, the sample is made ca 0.SN with sulfuric acid, and carbon tetrachloride containing 0.2% ZDBT is added. The colored copper-ZDBT complex is extracted in the carbon tetrachloride and measured at 438 mμ against a similar carbon tetrachloride extract of a blank. Data show good precision, and it is recommended that the ZDBT method be adopted as official, first action.

Determination of Small Bone Particles in Meat

1968 ◽  
Vol 51 (6) ◽  
pp. 1175-1177 ◽  
Author(s):  
Robert M Hill ◽  
B D Hites
Keyword(s):  
Carbon Tetrachloride ◽  
Meat Products ◽  
The Other ◽  
Small Particles ◽  
Bone Content ◽  
Bone Particles ◽  
Small Bone ◽  
Good Agreement

Abstract Very small particles of bone can be separated from ground meats and meat products by the following procedure: The bulk of the meat is solubilized by digestion with papain and the bone is separated from the other nondigestible material according to its ability to settle in a carbon tetrachloride: acetone mixture. Turkey samples with widely varying bone content were analyzed, with good agreement between duplicate samples.

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