Extraction and Colorimetric Determination of Thiosulfate and Tetrathionate in Soils

Nor, Yahya M.; Tabatabai, M. A.

doi:10.1097/00010694-197609000-00008

Cited by 67 publications

(11 citation statements)

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“…oxidation rate from amount of elemental sulfur applied (Fox et al 1964;Janzen and Bettany 1987a); (ii) the ubiquity of sultur oxidation observed in agricultural soils (Janzen and Bettany l987a,b;Lawrence and Germida 1988b); (iii) the relationship between the soil biomass and sulfur oxidation (Lawrence and Germida 1988b); (iv) the stimulation of sulfur oxidation by glucose amendment (Lawrence and Germida 1988b) and by plant rhizospheres (Grayston and Germida 1990). In addition, the production of thiosulfate by this population is consistent with the polythionate pathway thought to be active in soils (Nor and Tabatabai 1977;Wainwright 1984). Smaller populations of heterotrophic sulfate producers and heterotrophic thiosulfate oxidizers were also detected in most soils examined.…”

Section: Sulfur Oxidation Assaysupporting

confidence: 72%

Enumeration of sulfur-oxidizing populations in Saskatchewan agricultural soils

Lawrence¹,

Germida²

1991

Can. J. Soil. Sci.

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Section: Sulfur Oxidation Assaysupporting

confidence: 72%

Enumeration of sulfur-oxidizing populations in Saskatchewan agricultural soils

Lawrence¹,

Germida²

1991

Can. J. Soil. Sci.

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“…Thiosulphate and tetrathionate were determined colorimetrically (Nor and Tabatabai, 1976) using 10mM CaCI2 as the extractant. Since a fixed amount of sulphur was added to each soil, regardless of type, on a fresh weight basis all results were expressed on a g-~ FW basis.…”

Section: General Methodsmentioning

confidence: 99%

Oxidation of micronized elemental sulphur in soil

Chapman¹

1989

Plant Soil

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The rate of oxidation of micronized elemental sulphur in three soils was measured over a range of temperatures between 2 and 20~ Temperature had a marked effect with a Q10 (temperature coefficient) between 1.9-3.1. The period for 50% oxidation varied between 6-10 days at 20~ to between 36-42 days at 2~ All the oxidation curves showed an initial lag. At 20~ the oxidation rate was four times that of flowers of sulphur and was related to the smaller particle size. Additives (wetting and dispersing agents) in the commercial micronized sulphur preparation used ('Thiovit') were inhibitory at high concentrations but stimulatory at low concentrations. The significance to field conditions is discussed.

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“…I4c analyses were performed by the University of Arizona NSF Accelerator Mass Spectrometry Laboratory. Inorganic sulfur species were determined by Huffman Laboratories using the following methods: sulfate was determined by ion chromatography; thiosulfate, tetrathionate and thiocyanide were determined according to the methods described by Nor & Tabatabai (1976). CS2 extractions were carried out according to Heinrich et al (1961).…”

Section: Sample Analysesmentioning

confidence: 99%

Geochemistry of aquatic humic substances in the Lake Fryxell Basin, Antarctica

et al. 1996

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Abstract. Dissolved organic carbon (DOC) in Lake Fryxell, 10 streams flowing into the lake, and the moat surrounding the lake was studied to determine the influence of sources and biogeochemical processes on its distribution and chemical nature. Lake Fryxell is an amictic, permanently ice-covered lake in the McMurdo Dry Valleys which contains benthic and planktonic microbial populations, but receives essentially no input of organic material from the ahumic soils of the watershed. Biological activity in the water column does not appear to influence the DOC depth profile, which is similar to the profiles for conservative inorganic constituents. DOC values for the streams varied with biomass in the stream channe1,and ranged from 0.2 to 9.7 mg CIL. Fulvic acids in the streams were a lower percentage of the total DOC than in the lake. These samples contain recent carbon and appear to be simpler mixtures of compounds than the lake samples, indicating that they have undergone less humification. The fulvic acids from just above the sediments of the lake have a high sulfur content and are highly aliphatic. The main transformations occurring as these fractions diffuse upward in the water column are 1) loss of sulfur groups through the oxycline and 2) decrease in ali hatic carbon and increase in the heterogeneity of aliphatic moieties. The fraction of modem ' C content of the lake fulvic acids range from a minimum of 0.68 (approximately 3000 years old) at 15m depth to 0.997 (recent material) just under the ice. The major processes controlling the DOC in the lake appear to be: 1) The transport of organic matter by the inflow streams resulting in the addition of recent organic material to the moat and upper waters of the lake; 2) The diffusion of organic matter composed of relict organic material and organic carbon resulting from the degradation of algae and bacteria from the bottom waters or sediments of the lake into overlying glacial melt water, 3) The addition of recent organic matter to the bottom waters of the lake from the moat.

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Extraction and Colorimetric Determination of Thiosulfate and Tetrathionate in Soils

Cited by 67 publications

References 0 publications

Enumeration of sulfur-oxidizing populations in Saskatchewan agricultural soils

Enumeration of sulfur-oxidizing populations in Saskatchewan agricultural soils

Oxidation of micronized elemental sulphur in soil

Geochemistry of aquatic humic substances in the Lake Fryxell Basin, Antarctica

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