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

A measurement method and in-situ technology, which can be used in measurement devices, preparation of test samples, material analysis by electromagnetic means, etc., and can solve problems such as easy fire extinguishing.

Inactive Publication Date: 2014-08-13
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 the problem of easy fire extinguishing in the previous work, and the on-line separation can be done in 20 minutes. This method is more practical

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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 perform 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 des...

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Abstract

A Carius tube in-situ distillation Os on-line measurement method, the steps include: Carius tube method inverse aqua regia decomposition sample, the generated OsO4 vapor enters the carrier gas port of the atomizer through a special interface under the carrier of Ar gas, atomizes The Ir solution was introduced into the liquid inlet of the atomizer, and a mixed aerosol containing Os and Ir was formed at the nozzle of the atomizer. The difference between the present invention and the known technology is that the Ar gas carries the Os vapor into the carrier gas port of the atomizer and reaches the rectangular tube. The Ir standard solution introduced from the liquid inlet pipe of the present invention is used for online quality discrimination correction, and the measurement accuracy is obtained. Improvement: After the Carius tube dissolves the sample, there is no need to separate it, and it can be directly distilled in situ and at the same time accurately measure the Os isotope ratio and content online. Compared with the original on-line measuring method, the present invention is not easy to extinguish fire, and compared with the solution sampling measuring method, the memory effect is obviously 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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Patent Type & Authority Patents(China)
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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