Determination of Microgram Amounts of Total Sulfur in Rocks. Rapid and Accurate Analysis by a Combustion Method.

1963 ◽  
Vol 35 (12) ◽  
pp. 1971-1973 ◽  
Author(s):  
J. G. Sen. Gupta
Keyword(s):  
Combustion Method ◽  
Total Sulfur ◽  
Accurate Analysis

Determination of Sulfur in Rubber Vulcanizates

1956 ◽  
Vol 29 (2) ◽  
pp. 612-619 ◽  
Author(s):  
E. W. Zimmerman ◽  
V. E. Hart ◽  
Emanuel Horowitz
Keyword(s):  
Nitric Acid ◽  
Barium Sulfate ◽  
Combustion Method ◽  
Fusion Method ◽  
Total Sulfur ◽  
A Value ◽  
Acid Method ◽  
Barium Compounds ◽  
Good Agreement

Abstract A combustion method for rubber which determines the sulfur evolved at 480° to 500° C is compared with the fusion and the zinc-nitric acid methods. In the combustion method an interaction occurs between sulfur and fillers present in the rubber. The effect of particular fillers with respect to this interaction is discussed. A value representative of the organically bound sulfur in an extracted specimen can be obtained by the combustion method when no reaction takes place between the sulfur and the fillers during combustion. The fusion method yields results in good agreement with the total sulfur added in compounding the rubber samples. Except in the presence of barium compounds, the zinc-nitric acid method likewise determines total sulfur. When barium compounds are present, barium sulfate is formed during the oxidation, and low values are obtained for the total sulfur.

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