2018
DOI: 10.1002/rcm.8048
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A simple and reliable method reducing sulfate to sulfide for multiple sulfur isotope analysis

Abstract: RationalePrecise analysis of four sulfur isotopes of sulfate in geological and environmental samples provides the means to extract unique information in wide geological contexts. Reduction of sulfate to sulfide is the first step to access such information. The conventional reduction method suffers from a cumbersome distillation system, long reaction time and large volume of the reducing solution. We present a new and simple method enabling the process of multiple samples at one time with a much reduced volume … Show more

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Cited by 13 publications
(11 citation statements)
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“…The DDU samples were processed through chemical conversion into Ag 2 S, as described in Geng et al . 31 , and then into SF 6 in a method similar to that described by Ono et al . 32 , with modification as described by Hattori et al .…”
Section: Methodsmentioning
confidence: 99%
“…The DDU samples were processed through chemical conversion into Ag 2 S, as described in Geng et al . 31 , and then into SF 6 in a method similar to that described by Ono et al . 32 , with modification as described by Hattori et al .…”
Section: Methodsmentioning
confidence: 99%
“…Reduction of Na 2 SO 4 to H 2 S and Trapping H 2 S. The reduction of sulfate to sulfide was adapted from a known literature procedure. 51 Sodium sulfate (Na 2 SO 4 ) (493 mg) was added to a pre-dried Schlenk flask with a PTFE N 2 gas bubbler. The pressure of the gas was at 3 psi, and the Schlenk flask was connected with tygon tubing to five other flasks in sequence.…”
Section: ■ Results and Discussionmentioning
confidence: 99%
“… 34 S SO4 of gypsum sulfate from the Vena del Gesso basin was measured at IPGP (Paris) on gaseous SF 6 with a MAT-253 dual inlet mass spectrometer. The gypsum powder was first reduced with a "Thode" solution into H 2 S (Thode et al, 1961) that was subsequently trapped in NaOH solution and then precipitated into Ag 2 S by adding a AgNO 3 solution (Geng et al, 2018). The entire extraction procedure gave sulfur yields between 76 and 116% (n=29) with a mean of 95±2% (1σ), with the lowest yields explained by higher amount of non-sulfur bearing mineral phases such as clays.…”
Section: Isotopic Composition Of the Sulfate Ion Of Gypsummentioning
confidence: 99%