Radical and Ionic Reactions of Tetraethylthiuram Disulfide

1960 ◽  
Vol 33 (4) ◽  
pp. 1062-1067
Author(s):  
A. L. Klebanskiĭ ◽  
L. P. Fomina
Keyword(s):  
Carbon Tetrachloride ◽  
Quantitative Determination ◽  
Kinetic Investigation ◽  
Reaction Products ◽  
Ionic Reactions ◽  
Velocity Effect ◽  
Tetraethylthiuram Disulfide

Abstract 1. Investigation of the process of radical dissociation of TETD in carbon tetrachloride indicates that at 145° thiuram radicals are formed which react with the carbon tetrachloride to form (C2H5)2N—C‖S—SCl and CS2. 2. A quantitative determination of the products of the base-influenced dissociation of TETD was carried out. A kinetic investigation of this reaction, in which initiator (K2S2O3) and inhibitor (PBNA) were shown to have no velocity effect whatever, indicates that the process is an ionic one. 3. It is shown that in the reaction of TETD with diethylamine, one of the reaction products appears to be diethylammonium diethyldithiocarbamate.

Quantitative Determination of Copper in Natural Rubber

1953 ◽  
Vol 26 (1) ◽  
pp. 251-256 ◽  
Author(s):  
Lewis T. Milliken
Keyword(s):  
Carbon Tetrachloride ◽  
Natural Rubber ◽  
Quantitative Determination ◽  
Oxidation Process ◽  
Aqueous Suspension ◽  
Wet Oxidation ◽  
Acid Extract ◽  
Organic Solution ◽  
Determination Of Copper

Abstract A procedure is recommended in which small amounts of copper in rubber can be measured quantitatively by determining the depth of color of a copper carbamate complex in a carbon tetrachloride solution. The complex is formed in an alkaline solution prepared from an acid extract of the rubber ashed at 550° C. This procedure yields results which are as reliable as those obtained by the more tedious and time-consuming procedures involving the wet-oxidation process which are at present recommended by standardizing organizations. The use of an organic solution rather than an aqueous suspension gives better reproducibility, permits easier use of a photometer, and reduces the interference due to iron by a factor of ten.

Quantitative Determination of the Concentration of Vaporized Carbon Tetrachloride

1936 ◽  
Vol 8 (4) ◽  
pp. 260-263 ◽  
Author(s):  
John C. Olsen ◽  
Henry F. Smyth ◽  
George E. Ferguson ◽  
Leopold Scheflan
Keyword(s):  
Carbon Tetrachloride ◽  
Quantitative Determination

Toxicologic Studies on Hydrocarbons. VI. A Colorimetric Method for the Determination of Kerosine in Blood

1960 ◽  
Vol 6 (4) ◽  
pp. 327-331 ◽  
Author(s):  
Horace W Gerarde ◽  
Paul Skiba
Keyword(s):  
Sulfuric Acid ◽  
Carbon Tetrachloride ◽  
Quantitative Determination ◽  
Calibration Curve ◽  
Colorimetric Method ◽  
Acid Reagent

Abstract A photoelectric colorimetric method is described for the quantitative determination of kerosine in blood. The procedure involves hemolysis of 5 ml. of the sample followed by extraction of the kerosine with carbon tetrachloride. The extract is reacted with a formaldehyde- sulfuric acid reagent to produce a characteristic color. The intensity of this color is measured photometrically, and the concentration of kerosine is determined by reference to a previously prepared calibration curve. Concentrations as low as 10 ppm can be conveniently determined.

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