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

Inactive Publication Date: 2012-10-31
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

The Os isotope ratio was accurately measured on-line by in-situ distillation after the sample was dissolved in the Carius tube, which improved

Method used

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

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Embodiment Construction

[0017] The invention connects the gas outlet of the Carius tube to the carrier gas port of the nebulizer, introduces the Ir standard solution, can conveniently carry out on-line mass fractionation correction, and plays the role of monitoring the best state of the instrument. produced OsO 4 The steam quickly reaches the atomizer under the load of a large amount of carrier gas (Ar), and is evenly distributed in the Ir solution (medium 3% HNO3) lifted by the liquid inlet of the atomizer 3 ) in the aerosol generated, and enter the rectangular tube together with these fine and uniform aerosols.

[0018] The Ir standard solution is used for online mass discrimination correction, and the measurement accuracy is improved. After the Carius tube dissolves the sample, it can be directly distilled in situ without separation, and the Os isotope ratio and content can be accurately measured online at the same time.

[0019] The technical solutions of the present invention will be further d...

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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.

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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Application Information

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IPC IPC(8): G01N27/62G01N1/34G01N27/626
Inventor 靳新娣李文君相鹏张连昌
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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