Ionic separation column device and separation method for multiple isotopes

Abstract

The invention relates to an ionic separation column device and separation method for a plurality of isotopes. The ionic separation column device comprises a fixed unit, a height adjusting unit, an ionic separation column unit and a sample collecting unit. The separation method comprises the following steps: establishment of an ionic separation column; cleaning of the ionic separation column; and separation of isotopes. Compared with the prior art, the invention has the following beneficial effects: 1, the specification of the separation column is more reasonable, and corresponding separation columns are designed according to the characteristics of various isotopes on the basis of no influence on extraction accuracy; 2, resin with the best separation effect is selected according to the chemical characteristics of each isotope, e.g., special-effect resin Sr. Spec is used for Sr and Pb isotopes while transuranium resin (TRansUranic, i.e. TRU. Spec) and organic phosphonic acid resin Ln. Spec are used for Nd isotopes; and 3, three isotopes are separated at the same time, and the separation processes of the three isotopes are independent and interconnected, so human errors in experimentsare reduced.

Description

technical field [0001] The invention relates to multiple isotope ion separation column devices and separation methods, which can simultaneously separate isotopes such as strontium, neodymium, and lead in various samples (carbonate rocks, silicate rocks, and water samples), and the separation column is simple and convenient to manufacture. The corresponding isotopes can be efficiently separated, which greatly improves the efficiency of the experiment and the accuracy of extraction. Background technique [0002] Stable isotope is an important technical means to study the source of substances and assess the degree of environmental pollution. At present, there are many stable isotopes in nature, among which isotopes such as strontium, neodymium, and lead are widely used in the research of sediment and water source. Since strontium isotopes have four isotopes ( 84 Sr, 86 Sr, 87 Sr, 88 Sr), neodymium isotopes have up to seven isotopes ( 142 Nd, 143 Nd, 144 Nd, 145 Nd, 1...

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Problems solved by technology

Since strontium isotopes have four isotopes ( 84 Sr, 86 Sr, 87 Sr, 88 Sr), neodymium isotopes have up to seven isotopes ( 142 Nd, 143 Nd, 144 Nd, 145 Nd, 146 Nd, 148 Nd, 150 Nd), and the lead isotope also has four isotopes ( 204 Pb, 206 Pb, 207 Pb, 208 Pb), in the separation experiment, the separation effect of the traditional ion separation column is not good. The main reasons include: first, the design of the separation column is too lengthy, and the amount of sample to be filled is large, which is easy to be polluted; second, the specific isotope effect of the resin separation The third is that the experiment takes a long time, which greatly reduces the efficiency of the experiment

In recent years, with the development of experimental technology, researchers have changed the traditional three-column separation method to one separation column to simultaneously extract Sr-Nd-Pb isotopes. This method reduces the experimental time to a certain extent, but the extraction effect is still there. insufficient

One is that when multiple resins are mixed together, it is easy to confuse different isotopes; the other is that the separation effect on different isotopes of the same element is not good

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