Turbidimetric Determination of Sulfate in Water

Sheen, Robert T.; Kähler, Hendrik; Ross, Elliott M.; Betz, Willem; Betz, L. D.

doi:10.1021/ac50096a022

Cited by 50 publications

(25 citation statements)

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“…The method described by Dewis and Freitas (1970) was used for the determination of orthophosphate. Sulphate was determined by Sheen et al (1935). Chlorides were estimated according to Jackson (1960).…”

Section: Water Analysismentioning

confidence: 99%

Seasonal biodiversity and ecological studies on the epiphytic microalgae communities in polluted and unpolluted aquatic ecosystem at Assiut, Egypt

Adam¹,

Hifney²,

Fawzy³

et al. 2017

European Journal of Ecology

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A qualitative and quantitative study on epiphytic microalgae was carried out seasonally from November 2015 to August 2016 to follow up their community structures on aquatic macrophytes related to some physico-chemical properties of two polluted and unpolluted water bodies at Assiut, Egypt. A total of 169 species related to 64 genera of epiphytic microalgae were recorded. The most dominant algal group was Bacillariophyceae (43.2%), followed by Chlorophyceae (34.91%), Cyanophyceae (20.71%) and Euglenophyceae (1.18%). The total number of epiphytic algae fluctuated between 11.1 × 104ind.g-1plant dry wt. on Phragmites australis in summer at Nazlet Abdellah (polluted site) and 10.02 × 107ind.g-1plant dry wt. on Myriophyllum spicatum in winter at El-Wasta (unpolluted site). Some epiphytic microalgae were dominant as Pseudanabaena limnetica, Calothrix braunii, Scenedesmus acutus, and Ulnaria ulna. Others were specific on certain macrophytes as Aphanocapsa thermalis and Ulothrix sp., which grow on Phragmites australis, while Synechocystis minuscula attached itself on Myriophyllum spicatum. Analysis of PERMANOVA showed that the most important factors that induced the variation in epiphytic microalgae were the temporal variation and host plant. Water temperature, pH, nitrate, chloride, phosphate and total dissolved salts were the highest abiotic factors correlated with the variation in composition of epiphytic microalgae.

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Section: Water Analysismentioning

confidence: 99%

Seasonal biodiversity and ecological studies on the epiphytic microalgae communities in polluted and unpolluted aquatic ecosystem at Assiut, Egypt

Adam¹,

Hifney²,

Fawzy³

et al. 2017

European Journal of Ecology

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“…[33]. Cells were removed by centrifugation and the culture medium was concentrated 10e20 times through evaporation, and the precipitate was re-solubilized in 5-ml of distilled water.…”

Section: Analytical Proceduresmentioning

confidence: 99%

Hydrogen production with the microalga Chlamydomonas reinhardtii grown in a compact tubular photobioreactor immersed in a scattering light nanoparticle suspension

Giannelli¹,

Torzillo²

2012

International Journal of Hydrogen Energy

126

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“…Another method of sulfate measurement is the turbidimetric method, which is based on precipitation of sulfate ions as insoluble barium sulfates (Morais et al 2003;Sheen et al 1935;Singh et al 1996;Sobek et al 1978). The stability of barium sulfate is the main concern with this method.…”

Section: Introductionmentioning

confidence: 99%

“…The stability of barium sulfate is the main concern with this method. To improve the stability of the barium sulfate suspension, different stabilizing agents, including thymol and gelatin, tween80 (polysorbate 80), and polyvinyl alcohol, are employed (Sheen et al 1935;Singh et al 1996). Baban et al (1980) used EDTA in the barium sulfate turbidimetric method to reduce interference by metal ions.…”

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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Turbidimetric Determination of Sulfate in Water

Cited by 50 publications

References 1 publication

Seasonal biodiversity and ecological studies on the epiphytic microalgae communities in polluted and unpolluted aquatic ecosystem at Assiut, Egypt

Seasonal biodiversity and ecological studies on the epiphytic microalgae communities in polluted and unpolluted aquatic ecosystem at Assiut, Egypt

Hydrogen production with the microalga Chlamydomonas reinhardtii grown in a compact tubular photobioreactor immersed in a scattering light nanoparticle suspension

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

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