PREPARATION OF SF6 FOR SULFUR ISOTOPE ANALYSIS BY LASER HEATING SULFIDE MINERALS IN THE PRESENCE OF F2 GAS
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dc.contributor.author | Rumble D. | |
dc.contributor.author | Hoering T.C. | |
dc.contributor.author | Palin J.M. | |
dc.date.accessioned | 2020-11-11T07:24:41Z | |
dc.date.available | 2020-11-11T07:24:41Z | |
dc.date.issued | 1993 | |
dc.identifier | https://elibrary.ru/item.asp?id=31645782 | |
dc.identifier.citation | Geochimica et Cosmochimica Acta, 1993, , 18, 4499-4512 | |
dc.identifier.issn | 0016-7037 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/18960 | |
dc.description.abstract | The feasibility of in-situ fluorination of sulfide minerals for sulfur isotope analyses has been demonstrated. Laser fluorination of powdered samples, previously analyzed by conventional bulk SO[sub 2] or BrF[sub 5] methods, verifies that comparable precision and accuracy can be achieved with the new method. The [delta][sup 34]S[sub CDT] and [delta][sup 33]S[sub CDT] values of powdered samples are independent of F[sub 2] gas pressure over a range of from 15 to 120 torr. Furthermore, [delta][sup 34]S[sub CDT] values are independent of SF[sub 6] yields from 40 to 100% for powders that do not fluorinate spontaneously at room temperature. The precision of replicate analyses of powdered pyrite, troilite, chalcopyrite, sphalerite, galena, acanthite, and greenockite is typically 0.1-0.2[per thousand]. Interlaboratory comparisons of previously analyzed powders agree as closely as 0.1[per thousand] and disagree by as much as 0.8[per thousand] over a range of [delta][sup 34]S[sub CDT] from [minus]30 to +34[per thousand]. The technique of in-situ laser fluorination was validated by comparison of analyses of side-by-side laser craters and powders from drill holes in polished sulfide mineral surfaces. For isotopically homogeneous samples, laser craters and drill hole powders agree within 0.1-0.3[per thousand] for both [delta][sup 34]S[sub CDT] and [delta][sup 33]S[sub CDT], depending on the mineral analyzed. | |
dc.title | PREPARATION OF SF6 FOR SULFUR ISOTOPE ANALYSIS BY LASER HEATING SULFIDE MINERALS IN THE PRESENCE OF F2 GAS | |
dc.type | Статья |
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