A new method for the determination of the<sup>34</sup>S/<sup>32</sup>S ratio of water-soluble sulphur in soil

Fox, M. A.; Zhao, Fang‐Jie; McGrath, Steve P.

doi:10.1080/03067310410001679994

Cited by 3 publications

(2 citation statements)

References 23 publications

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“…The classifications of sulfur species in soils are diverse, 68,245 and AVS–CRS–sulfate–OBS are sequentially extracted 246 . Adsorbed‐state sulfate is extracted through KH 2 PO 4 and NaH 2 PO 4 solutions 229,247 …”

Section: Chemical Treatmentmentioning

confidence: 99%

Procedures from samples to sulfur isotopic data: A review

Zhao,

Guo,

Zhang

et al. 2024

Rapid Comm Mass Spectrometry

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RationaleSulfur isotopes have been widely used to solve some key scientific questions, especially in the last two decades with advanced instruments and analytical schemes. Different sulfur speciation and multiple isotopes analyzed in laboratories worldwide and in situ microanalysis have also been reported in many articles. However, methods of sampling to measurements are multifarious, and occasionally some inaccuracies are present in published papers. Vague methods may mislead newcomers to the field, puzzle readers, or lead to incorrect data‐based correlations.MethodsWe have reviewed multiple methods on sulfur isotopic analyses from the perspectives of sampling, laboratory work, and instrumental analysis in order to help reduce operational inhomogeneity and ensure the fidelity of sulfur isotopic data. We do not deem our proposed solutions as the ultimate standard methods but as a lead‐in to the overall introduction and summary of the current methods used.ResultsIt has been shown that external contamination and transformation of different sulfur species should be avoided during the sampling, pretreatment, storage, and chemical treatment processes. Conversion rates and sulfur isotopic fractionations during sulfur extraction, purification, and conversion processes must be verified by researchers using standard or known samples. The unification of absence of isotopic fractionation is needed during all steps, and long‐term monitoring of standard samples is recommended.ConclusionThis review compiles more details on different methods in sampling, laboratory operation, and measurement of sulfur isotopes, which is beneficial for researchers' better practice in laboratories. Microanalyses and molecular studies are the frontier techniques that compare the bulk sample with the elemental analysis/continuous flow–gas source stable isotope ratio mass spectrometry method, but the latter is widely used. The development of sulfur isotopic measurements will lead to the innovation in scientific issues with sulfur proxies.

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Section: Chemical Treatmentmentioning

confidence: 99%

Procedures from samples to sulfur isotopic data: A review

Zhao,

Guo,

Zhang

et al. 2024

Rapid Comm Mass Spectrometry

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“…Unlike geochemical investigations, ecological studies have focused on the isotopic composition of sulfur (S) only recently 1–7. This may be ascribed to the fact that the concentration of S in biological structures is low compared with other light elements, while its occurrence is high in industrialized countries.…”

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confidence: 99%

Signal improvement in elemental analyzer/continuous flow isotope ratio mass spectrometry for samples with low sulfur contents using a pre‐concentration technique for on‐line concentration adjustment

Fritzsche

Tichomirowa

2006

Rapid Comm Mass Spectrometry

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Elemental analyzer/continuous flow isotope ratio mass spectrometry (EA/CF-IRMS) has become a standard procedure for the determination of delta(34)S values. Common procedures are, however, frequently less than satisfactory for organic as well as for mineral samples with very low concentrations of sulfur (<2000 ppm). Here we present a method which employs cold trapping of SO(2) to adjust the gas concentration for subsequent isotope signature determination. Analytical accuracy is comparable with common EA/CF-IRMS analysis without trapping, showing a precision of better than +/-0.4 per thousand in delta(34)S (1 SD). The virtual absence of memory effects was established by analyzing adjacent samples exhibiting a large difference in delta(34)S and by prolonged freezing of the carrier gas, yielding virtually no S concentration peak. The method was tested using less than 15% (6 microg) of the S required for a conventional isotope analysis at comparable signal intensity. Even smaller samples can be analyzed with high precision. This facilitates the on-line delta(34)S determination in small biological and mineral samples, minimizing matrix effects in various materials including sandstone, soil, and plant samples.

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Atomic spectrometry update. Atomic mass spectrometry

Bacon¹,

Linge

Vaeck

2005

J. Anal. At. Spectrom.

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A new method for the determination of the³⁴S/³²S ratio of water-soluble sulphur in soil

Cited by 3 publications

References 23 publications

Procedures from samples to sulfur isotopic data: A review

Procedures from samples to sulfur isotopic data: A review

Signal improvement in elemental analyzer/continuous flow isotope ratio mass spectrometry for samples with low sulfur contents using a pre‐concentration technique for on‐line concentration adjustment

Atomic spectrometry update. Atomic mass spectrometry

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A new method for the determination of the34S/32S ratio of water-soluble sulphur in soil

Cited by 3 publications

References 23 publications

Procedures from samples to sulfur isotopic data: A review

Procedures from samples to sulfur isotopic data: A review

Signal improvement in elemental analyzer/continuous flow isotope ratio mass spectrometry for samples with low sulfur contents using a pre‐concentration technique for on‐line concentration adjustment

Atomic spectrometry update. Atomic mass spectrometry

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A new method for the determination of the³⁴S/³²S ratio of water-soluble sulphur in soil