Device and detection method for Os in-situ distillation of Carius tube

Abstract

The invention discloses a device for Os in-situ distillation of a Carius tube. A top cover of an electric heating steam bath boiler is provided with multiple circular holes matched with the diameter of the Carius tube, a clapboard with small holes is arranged inside the middle of the electric heating steam bath boiler, the Carius tube is vertically inserted into the circular holes on the top cover of the electric heating steam bath boiler, and the bottom of the Carius tube is supported on the clapboard, thereby guaranteeing that the Carius tube is placed into steam; an upper part of the Carius tube is sealed by a rubber head of a dropping bottle, and an air inlet and an air outlet are respectively opened at the top of the rubber head of the dropping bottle; an air inlet thin pipe is arranged in the air inlet hole, and an air outlet thin pipe is inserted into the air outlet; one end of the air inlet thin pipe is extended to the bottom of the Carius tube, and the other end of the air inlet thin pipe is connected to an external air source; and one end of the air outlet thin pipe is extended to a neck part of the Carius tube, and the other end of the air outlet thin pipe is connected to the bottom of an absorbing bottle. The invention also discloses a method for the Os in-situ distillation. The device is simple in constitution, convenient to use, and high in output capacity, and is capable of distilling multiple samples simultaneously, thereby being suitable for batch sample analysis.

Description

technical field [0001] The invention belongs to an Os dating and isotope tracing technology, in particular to a device for in-situ distillation of Os in a Carius tube. [0002] The invention also relates to a method for distillation using the above-mentioned apparatus. technical background [0003] In recent years, Re-Os dating and isotope tracing techniques have received more and more attention. As more and more molybdenites are newly discovered, the task of Re-Os testing and research is becoming more and more arduous. Usually, the accurate determination of Os is an important part of Re-Os dating, and the separation speed of Os is the key factor affecting the dating efficiency. Therefore, it is urgent to further improve the efficiency of Re-Os testing. [0004] Os separation, for ICP-MS measurement, the most commonly used method is distillation [Du Andao, Qu Wenjun, Li Chao, etc., Rhenium-osmium isotope dating methods and progress in analysis and testing technology, 2009,...

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Problems solved by technology

Jin [Xindi Jin, Andao Du, Wenjun Li, J.Anal.At.Spectrom., 2010, 26:1245-1252] et al. 4 The steam is connected to the carrier gas port of the atomizer, and the Os isotope ratio is determined online by in-situ distillation after the Carius tube dissolves the sample, which improves the problems of inconvenient sample change and easy fire extinguishing in previous work, but there is still the need to clean the rectangular tube frequently , Too much acid gas in the instrument room, etc.

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