Sulfur Determination in Geological Samples Based on Coupled Analytical Techniques: Electric Furnace-IC and TGA-EGA

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Section: Resultsmentioning

confidence: 52%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Determination of Carbon, Hydrogen, Nitrogen and Sulfur in Geological Materials Using Elemental Analysers

Gazulla

Rodrigo

Orduña

et al. 2012

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“…(), Ga ‐ Gazulla et al . (), Go ‐ Govindaraju (), Gl ‐ Glasby et al . (), H&G ‐ Hu and Gao (), H&P ‐ Hall and Pelchat (), K ‐ Kubota (), Ma ‐ Marin et al .…”

Section: Resultsunclassified

Abundances of Sulfur, Selenium, Tellurium, Rhenium and Platinum‐Group Elements in Eighteen Reference Materials by Isotope Dilution Sector‐Field ICP‐MS and Negative TIMS

Wang

Becker

2014

Geological reference materials (RMs) with variable compositions and NIST SRM 612 were analysed by isotope dilution mass spectrometry for bulk rock concentrations of chalcogen elements (sulfur, selenium and tellurium), rhenium and platinum‐group elements (PGEs: Ru, Pd, Os, Ir and Pt), including the isotope amount ratios of 187Os/188Os. All concentrations were obtained from the same aliquot after HCl‐HNO3 digestion in a high pressure asher at 320 °C. Concentrations were determined after chemical separation by negative TIMS, ICP‐MS and hydride generation ICP‐MS (Se, Te). As in previous studies, concentrations of the PGEs in most RMs were found to be highly variable, which may be ascribed to sample heterogeneity at the < 1 g level. In contrast, S, Se and Te displayed good precision (RSD < 5%) in most RMs, suggesting that part of the PGE budget is controlled by different phases, compared with the chalcogen budget. The method may minimise losses of volatile chalcogens during the closed‐system digestion and indicates the different extent of heterogeneity of chalcogens, Re and PGEs in the same sample aliquot. OKUM, SCo‐1, MRG‐1, DR‐N and MAG‐1 are useful RMs for the chalcogens. NIST SRM 612 displays homogenous distribution of S, Se, Te, Pt and Pd in 30 mg aliquots, in contrast with micro‐scale heterogeneity of Se, Pd and Pt.

“…This is a result of the complicated and/or time‐consuming methods of sulfur determination (e.g., Michel and Villemant 2003, Gros et al. 2005, Gazulla et al. 2009), in most cases requiring special instrumentation and difficult calibrations (e.g., Bédard et al.…”

mentioning

confidence: 99%

Determination of Total Sulfur in Fifteen Geological Materials Using Inductively Coupled Plasma‐Optical Emission Spectrometry (ICP‐OES) and Combustion/Infrared Spectrometry

Ackerman

Rohovec

Šebek

2012

A method for the determination of total sulfur in geological materials by inductively coupled plasma‐optical emission spectrometry (ICP‐OES) is described. We show that good results were obtained using this method even for sample types with very low (< 20 μg g−1) sulfur concentration (e.g., peridotite). Sulfur was determined in fifteen geological reference materials with different sulfur contents. For reference materials with certified sulfur contents, the ICP‐OES method gave results in excellent agreement with certified values, and uncertainties better than 4% RSD. ICP‐OES results for sulfur in other reference materials yielded RSDs better than 10%, where S concentrations were > 100 μg g−1 (except for diabase W‐2a, 16% RSD). Reference materials with lower sulfur contents (< 40 μg g−1) showed much higher RSDs (17–18%). Except for RMs with certified values for sulfur, most data obtained by the combustion infrared detection method generally showed higher concentrations than those measured by ICP‐OES and a better RSD (≤ 8% for all materials except DTS‐2b).