Critical parameters in the barium perchlorate/Thorin titration of sulfate

Haartz, J. C.; Eller, Peter M.; Hornung, Richard

doi:10.1021/ac50049a056

Cited by 14 publications

(3 citation statements)

References 6 publications

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“…(modified titration method after 12,13 ); Ca 2+ and Mg 2+ (in absorption mode while Na + and K + in emission mode of the atomic absorption spectrophotometer. The results were tested by Normalized Inorganic Charge Balance 14 and ion charge balance was little above ±5% for the samples.…”

Section: -mentioning

confidence: 99%

Geochemical assessment of ground water in a small tropical coral island of kadamat, union territory of Lakshadweep, India

Vs¹

2019

IJH

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In Kadamat ground water occurs under phreatic condition and floats as lens over the marine water and the principal aquifers are coral sands and coral limestones. The depth of the wells 1.5-3.8 mbgl and depth to the water table 1.2 to 3.6 mbgl. The ground water is under Na+-SO 4 2type, shallow meteoric percolation types and alkaline (EC variation 435-881 micromhos /cm at 25 o C. The water sample is Ca-HCO 3 Type (recharge type). The hydrochemistry is mainly controlled by e v a p o r a t i o n , partly influenced by waterrock interaction and aquifer m a t e r i a l s. The evaporation process played major role in the evolution of water chemistry. The suitability of ground water in the study area for various purposes is highlighted.

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Section: -mentioning

confidence: 99%

Geochemical assessment of ground water in a small tropical coral island of kadamat, union territory of Lakshadweep, India

Vs¹

2019

IJH

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“…(DESCA 1980). Titrimetric methods in ethanolic solution with thorin as an indicator have been described (Fritz and Yamamura 1955;Macchi et al 1969), but the conditions necessary for satisfactory titrations are critical for accuracy (Haartz et al 1979) and prior removal of cations from the sample by ion exchange (Fritz and Yamamura 1955) is required.…”

Section: Introductionmentioning

confidence: 99%

Development and Validation of a Spectrophotometric Method to Measure Sulfate Concentrations in Mine Water without Interference

2011

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Sulfate concentrations are determined in mine water by gravimetric, titrimetric, colorimetric, turbidometric, ion chromatographic, inductively coupled plasma absorption spectrophotometric, and other methods. Accurate sulfate measurement of mine water can be difficult due to interfering groups, cations, and anions, mainly arsenate (AsO 4 3-) and phosphate (PO 4 3-). In this paper, a simple and effective spectrophotometric method is described for the determination of sulfate in mine water. When the SO 4 2-reacts with barium chloranilate at pH 4.5 in aqueous ethyl alcohol solution, it releases acid-chloranilate, which shows maximum absorption at 350 nm and obeys Beer's law over the concentration range of 10-1,000 mg/L. Results show that the proposed method was significantly more accurate than a conventional method. Absorbance was found to increase linearly with increasing concentration of sulfate, which is corroborated by the calculated correlation coefficient value of 0.999 (n = 7). The slope and intercept of the equation of the regression line were 0.00091 and 0.00778, respectively. The limit of detection and limit of quantification were found to be 0.03861 and 0.06774 mg/L, respectively. The validity of the described procedure was assessed. Statistical analysis of the result indicated high accuracy and good precision. The proposed method was successfully applied in mine water without interference from common groups like AsO 4 3-and PO 4 3-. The relative standard deviations of the proposed method ranged from 0.03 to 0.26%, with recoveries of 99.79-101.57%.

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“…As an arsenical, Thorin is classified accordingly under hazard class 6.1 in the MSDS and use of Thorin as an indicator in spectrophotometry is cautioned against. 82 Lastly, arsenobetaine is an example of a naturally-occurring organoarsenic compound of As(V) predominant in marine life. Being the arsenic analogue of betaine, is biosynthesized in a similar manner.…”

Section: Syntheses Of Organoarsine Compoundsmentioning

confidence: 99%

Developing the catalytic asymmetric hydroarsination reaction

Tay¹

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Critical parameters in the barium perchlorate/Thorin titration of sulfate

Abstract: The analysis for sulfur-containing species such as sulfur dioxide, sulfur trioxide, and sulfates in the atmosphereboth ambient and workplace -

Cited by 14 publications

References 6 publications

Geochemical assessment of ground water in a small tropical coral island of kadamat, union territory of Lakshadweep, India

Geochemical assessment of ground water in a small tropical coral island of kadamat, union territory of Lakshadweep, India

Development and Validation of a Spectrophotometric Method to Measure Sulfate Concentrations in Mine Water without Interference

Developing the catalytic asymmetric hydroarsination reaction

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