Determination Of Sulfur In Soils Research Articles

Determination of sulfur in Soils and Stream Sediments by Wavelength Dispersive X-ray Fluorescence Spectrometry

A simple, rapid and nondestructive wavelength dispersive X-ray fluorescence spectrometry (WD-XRF) was developed for the determination of sulfur in soils and stream sediments. WD-XRF was used to study the spectral line shifts and matrix effects of different inorganic species such as sulfide, elemental sulfur, thiosulfate, sulfite and sulfate. Analysis of the spectral lines in the S Kα wavelength range confirmed that Mo Lα (2θ = 111.799 °) lines interfered with S Kα (2θ=110.683°) lines. Twenty-seven soils and stream sediments reference samples were used to calibrate and evaluate the analytical method and the detection limit for sulfur was 5.43 mg/kg. The relative error (%RE) of the reference samples was −8.3–6.4%, showing good accuracy. However, the single form of sulfur (sulfide, sulfite and sulfate) had a significant matrix enhancement effect in the sodium carbonate matrix, especially for sulfides, and its relative error was 11.9 ~ 26.9%. The results of WD-XRF, inductively coupled plasma emission spectroscopy (ICP-OES) and elemental infrared analyzer were compared. The fitness for purpose of the results was also evaluated by the quality criteria test proposed by the International Geological Correlation Programme (IGCP), from which it can be deduced that the method was adequate considering geochemical mapping application.

Determination of Total Sulfur in Soils and Plants by an Automated Dry Combustion Method

Determination of total sulfur in environmental samples can be accomplished using automated dry combustion techniques. The analytical performance of an elemental analyzer (CE Instruments) was compared with a method involving dry ashing followed by ion chromatographic detection of sulfate (IC). Samples included certified reference materials, confirmation materials with a known content of sulfur, and several soils and plants. There was a close agreement between both methods. Superior accuracy, precision and detection limits were obtained using the dry combustion method. Current results suggest that the automated dry combustion technique has developed into an adequate method for the determination of the relatively low total sulfur contents commonly encountered in soils and plants.

Determination of total sulfur in soils and plant materials by ion chromatography

Abstract An accurate and precise ion Chromatographie (IC) method is described for determination of total S in soils and plant materials. It involves ignition of a mixture of soil and NaHCO3or plant material and NaHCO3containing Ag2O at 550°C for 3 h. The residue is dissolved in 1MHOAc, diluted with deionized water, filtered, and analyzed for S02‐ 4by a Dionex model 2002i ion Chromatograph. Results by the IC method of seven Iowa soils, three Chilean soils, and 10 plant materials agreed closely with those obtained by the methylene blue method after alkaline oxidation with NaOBr. In general, the IC method was more precise than the methylene blue method. The method is simple and requires a minimum of analytical skill. A single operator can analyze 30–40 soil or plant samples in a normal working day.

Automated Turbidimetric Determination of Sulfate Sulfur in Soils and Fertilizers and Total Sulfur in Plant Tissues

Abstract An automated turbidimetric method has been developed for the rapid and accurate determination of sulfate. The method is practical and useful for accurately measuring total sulfur in plant tissues, and extractable sulfate in soils and fertilizers. The principle of intermittent reagent addition is used, which eliminates drift and sensitivity changes caused by coating of BaSO4 on tubing and cell walls. Also, the appropriate chemistry is used to minimize coating and interactions of the wash with the sample at a sampling rate of 30/h. The sensitivity of the method is excellent with a working range of 0–15 ppm sulfur for soils. For plant and fertilizer digests, the sample solutions are diluted to 0–35 ppm S. The precision as determined by repeated analysis of a soil sample extract was 0.58% relative standard deviation (RSD) with a mean of 9.26 μg extractable sulfate sulfur. On another soil sample, using a different extractant and extraction procedure, the RSD was 0.64%, mean of 9.29 μg/g. Multiple automated sulfur analyses on a plant tissue digest resulted in an RSD of 0.41% for a sample containing 0.21% S. The average recovery of sulfate sulfur on 5 Magruder Fertilizer Check Samples by the automated turbidimetric method was 100.6%, range of 99.8 to 101.4%, as compared to gravimetric analysis. The automated turbidimetric method for sulfate has excellent precision and sensitivity in plant tissue and soil analyses where gravimetric BaSO4 assays are not practical. The method is rapid, precise, and accurate for analysis of sulfate sulfur in fertilizers.

X-ray Fluorescence Determination of Total Sulphur in Soils Compared with two Chemical Methods

X-ray Fluorescence Determination of Total Sulphur in Soils Compared with two Chemical Methods

Methods for the determination of total sulphur in soils and plant materials

Methods for the determination of total sulphur in soils and plant materials

Determination of Sulphur in Soils and Plant Material

Soil Science Society of America JournalVolume 33, Issue 5 p. iv-iv Book Review Determination of Sulphur in Soils and Plant Material By James D. Beaton, George R. Burns, and Jan Platou. Tech. Bull. No. 14, The Sulphur Institute, 1725 K St., NW, Washington, D.C. 20006. 56 p. 1968. Singles copies free First published: 01 September 1969 https://doi.org/10.2136/sssaj1969.03615995003300050007xAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat No abstract is available for this article. Volume33, Issue5September-October 1969Pages iv-iv RelatedInformation

The determination of sulphur in soils by X-ray fluorescence analysis

A method for determining the total sulphur content of soils is described that is sufficiently rapid (less than 4 minutes per sample) and sensitive (lower limit of detection less than 10 p.p.m. of sulphur) for survey and fertility investigations. A simple correction for matrix effects, caused by large variations (10 to 90 per cent.) of organic matter content has been found, based on the loss of weight at 450° C.

Sulphur in soils.II.—Determination of the total sulphur content of soil

AbstractPublished methods for the determination of total sulphur in soil are reviewed. A method is described for determining total sulphur in soil in which all the sulphur is reduced to sulphide by heating the soil with ferrum reductum. The sulphide is treated with acid and the evolved hydrogen sulphide estimated iodimetrically with standard alkaline hypochlorite solution as absorbent. The method is specific for sulphur. It has been found applicable to the determination of sulphur in soils of widely diverse origins and in many kinds of pure substances, both organic and inorganic. An error of ± 2.5% can be expected in the determination of total sulphur in soil.

A method for the determination of total sulphur in soils

A method for the determination of total sulphur in soils