Method for in-situ distillation and on-line measurement of Os in Carius tube

A measurement method and in-situ technology, applied in the direction of measurement devices, preparation of test samples, material analysis through electromagnetic means, etc., can solve problems such as easy fire extinguishing
CN102759562AInactive Publication Date: 2012-10-31INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
Publication Date
2012-10-31
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a method for in-situ distillation and on-line measurement of Os in a Carius tube. The method comprises the following steps: a sample is decomposed by inverse aqua regia in a Carius tube method, the generated OsO4 steam enters into a carrier gas port of an atomizer under carry of Ar gas through a special interface, Ir solution is introduced into a liquid inlet of the atomizer, and mixed aerosol comprising Os and Ir is formed at a nozzle of the atomizer. According to the invention, in comparison with the prior art, the Ar gas enters into the carrier gas port of the atomizer along with the Os steam and reaches a rectangular pipe, and the Ir standard solution introduced from the liquid inlet pipe is used for on-line discrimination and correction, so that the measuring precision is improved; after the sample is dissolved by the Carius tube, the in-situ distillation is directly carried out without separation, and meanwhile, a ratio and a content of an Os isotope can be obtained by on-line precise measurement. In comparison with the original on-line measurement method, the method, provided by the invention, is difficult to put out a fire, and in comparison with a solution feeding measurement method, a memory effect is remarkably reduced.
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Description

technical field

[0001] The invention relates to an Os dating and isotope tracing technology, in particular to an on-line measurement method of Os by in-situ distillation of a Carius tube. Background technique

[0002] In recent years, Re-Os (rhenium-osmium) dating and isotope tracing techniques have received more and more attention. Molybdenite dating is one of the important application methods of the Re-Os isotope system. It has been developed since the early 1980s. There are many molybdenite dating methods and related research reports (such as [R.Markey, H.Stein and J.Morgan, Talanta, 1998, 45, 935-946], [Andao Du, Shuqi Wu, Dezhong Sun Wang, W .Qu, R.Markey, H.Stein, J.Morgan and D.Malinovsky, Preparation and Certification of Re-Os Dating Reference Materials: Molybdenite HLP and JDC, Geostandard and Geoanalytical Research, 2004, 28(1): 41-52 ], [Standarizing Re-Os geochronology: A new molybdenite Reference Material (Henderson, USA) and the stoichiometry of Os salts, Chem...

Claims

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