Separation and Determination of Microgram Amounts of Sulfur

Determination of atmospheric concentrations of sulfuric acid aerosol by spectrophotometry, coulometry, and flame photometry

“…Table II lists the analyses of samples collected in Philadelphia and in Chicago, shown as P and C numbers, respectively. These samples, supplied to us from the previously mentioned source, should be typical of high pollution Again, the proportion of sulfuric acid varies between 26 and 96.3% of the total sulfate. Our analyses of sulfuric acid are presented in duplicate to indicate the expected reproducibility of the recommended method.…”

“…The sulfur dioxide produced is determined either spectrophotometrically, coulometrically, or flame photometrically. A similar technique has been used to determine total sulfur in metals and other materials, but at elevated temperatures (20)(21)(22)(23)(24)(25)(26)(27)(28).…”

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

“…Larsen, Ross, and Ingber (7) modified this method by using nitrogen as the carrier gas and reducing sulfur trioxide to dioxide by heated copper and determined sulfur in uranium trioxide, sodium zirconium fluoride, and hydrofluoric acid. This latter technique was employed by Bloomfield (2) for the determination of sulfur in soils, but it has not been applied to the analysis of rocks.…”

“…The proposed titrimetric method for final determination of sulfur dioxide is more rapid than the colorimetric method employed bj" Larsen, Ross, and Ingber (7) and by Bloomfield (2), and is now used in the Geological Survey for the determination of sulfur in a variety of rock types.…”

Application of the Pararosaniline-Formaldehyde Spectrophotometric Method to the Determination of Sulfur in Blister and Refined Copper.

“…A method that has had considerable success is that developed by West and Gaeke (7). It involves the absorption of sulfur dioxide in a solution of sodium tetrachloromercurate followed by addition of p-rosaniline hydrochloride and formaldehyde to form a purple-colored sulfonic acid derivative of pararosaniline (4) • Larsen, Ross, and Ingber (3) applied the method to the analysis of sulfur in uranium trioxide, sodium zirconium fluoride, and hydrofluoric acid while Burke and Davis (£) applied the same technique to the analysis of sulfur in nickel and steel and their alloys. Unfortunately, Burke and Davis, in analyzing the only copper-base sample (Cast Bronze, NBS #52A) obtained a sulfur assay twice as high as indicated by the National Bureau of Standards.…”