A Rapid Method for the Determination of Micro Amounts of Sulfur in Selenium.

Acs, Laszlo.; Barabas, Silvio.

doi:10.1021/ac60215a039

Cited by 10 publications

(3 citation statements)

References 13 publications

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“…Interferences associated with the present methods for the determination of sulfur dioxide have been reviewed by Thomas (5) and by Mueller et al (6). Several investigators have suggested modifications to eliminate interferences or increase reliability (7)(8)(9)(10)(11)(12). It was decided that an investigation of important parameters and of possible modifications would be of value.…”

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confidence: 99%

Spectrophotometric determination of atmospheric sulfur dioxide

Scaringelli¹,

Saltzman²,

Frey³

1967

Anal. Chem.

156

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Two improved pararosaniline methods developed for the spectrophotometric determination of sulfur dioxide in ambient air yield greater sensitivity, greater reproducibility, and adherence to Beer's law throughout a greater working range than the West and Gaeke method. These improvements resulted from optimization of the important parameters. The pararosaniline dye was specially purified and standardized to reduce variability problems. Phosphoric acid was (1) A.

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confidence: 99%

Spectrophotometric determination of atmospheric sulfur dioxide

Scaringelli¹,

Saltzman²,

Frey³

1967

Anal. Chem.

156

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“…2,3 A number of investigations have been reported that have aimed to minimize the interference due to impurities in the dye, ozone, oxides of nitrogen and transition metal ions. [4][5][6][7][8][9][10] The addition of the dye for colour development during the chemical analysis stage plays an important role. Usually, pararosaniline hydrochloride (PRA) dye is used in this method.…”

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confidence: 99%

Use of rosaniline hydrochloride dye for atmospheric SO2 determination and method sensitivity analysis

Goyal

2001

J. Environ. Monitor.

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The para-rosaniline hydrochloride (PRA) dye-based manual method (P. W. West and G. C. Gaeke, Anal. Chem., 1956, 28, 1816) is widely used for sulfur dioxide measurements in the atmosphere, particularly in developing countries. In this investigation, the properties of a less costly, rosaniline hydrochloride (RA) dye were found to be similar to those of the PRA dye, and showed no significant variation in atmospheric SO2 determination. Furthermore, the sensitivity of various operational parameters to slight changes similar to those encountered during normal use in the different stages of monitoring, namely sample collection and chemical analysis, was evaluated using both dyes, and the deviations in the method response from the reference parameter value were quantified. The method was found to be highly sensitive to the amount of reagent (HCHO and dye) addition in SO2 exposed samples for colorimetric determination. Therefore, utmost care is required in the preparation of reagents and in the addition of the appropriate amount of reagents during chemical analysis in order to obtain the actual concentrations of SO2 in the atmosphere.

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“…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).…”

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confidence: 99%