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A method for detecting trace rare earth elements

A rare earth element and trace technology, applied in the field of rare earth element detection, can solve the problem that the determination of trace rare earth elements is not ideal, and achieve the effect of improving sensitivity and accurate determination

Active Publication Date: 2022-02-01
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Abstract
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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for detecting trace rare earth elements, to solve the technical problem that the above-mentioned existing detection technology is not very ideal for measuring trace rare earth elements, and successfully establishes a direct, simple and efficient method using HR-ICP-MS A method for the rapid and accurate determination of ultra-low content rare earth elements

Method used

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  • A method for detecting trace rare earth elements
  • A method for detecting trace rare earth elements
  • A method for detecting trace rare earth elements

Examples

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Effect test

Embodiment 1

[0051] The present embodiment adopts the external standard method (working curve method) combined with the internal standard correction method. At low resolution R=300 for 45 Sc, 89 Y, 139 La, 140 Ce, 141 Pr, 146 Nd, 147 Sm, 153 Eu, 158 Gd, 159 Tb, 163 Dy, 166 Two, 169 Tm, 172 Yb and 175 Lu was measured.

[0052] For mixed standard element solutions with working curve concentrations of 0.00, 0.10, 0.50, 1.00, and 5.00ng / ml, the signal of the target element has a linear relationship with the concentration, and the correlation coefficient of the linear equation has reached the level of 0.9999, which is conducive to the accurate determination of traces in geological samples concentration of rare earth elements. The concentration of the mixed standard solution is diluted to 10 μg / ml, using 2% (V / V) HNO 3 Diluted step by step, and added 1ng / ml In as internal standard to the working curve mixed standard solution.

[0053] Step 1 Sample Digestion

[0054] Six nation...

Embodiment 2

[0067] The detection method is the same as in Example 1 except that the nitrogen flow rate is limited to 0 mL / min.

Embodiment 3

[0069] The detection method is the same as in Example 1 except that the nitrogen flow is limited to 3mL / min.

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Abstract

The invention discloses a method for detecting trace rare earth elements. Ar and N 2 As a carrier gas, it can greatly reduce the interference effect that is more serious than conventional atomization at room temperature when using a heating condensing device. Using the combination of different types of skimmer cones and S sampling cones, the sensitivity of the instrument to detect rare earth elements has been further improved. This method was used to determine the content of rare earth elements in 8 kinds of international and domestic carbonatite and peridotite geological standard reference materials, and the measured values ​​were consistent with the reference values ​​within the error range. The invention successfully establishes a method for directly, simply, quickly and accurately measuring trace rare earth elements by adopting HR-ICP-MS.

Description

technical field [0001] The invention relates to the technical field of rare earth element detection, in particular to a method for detecting trace rare earth elements. Background technique [0002] Rare Earth Element (REE) refers to 15 lanthanide elements with atomic numbers from 57 to 71, which belong to group IIIB in the periodic table, scandium element with atomic number 21 and yttrium element with 39 in the same group are also generally called rare earth elements. Due to the special electron layer structure of rare earth elements, their chemical properties are very similar. As the atomic number increases, the atomic (ionic) radius of the rare earth elements decreases, which is called "lanthanide shrinkage". The abundance of rare earth elements in various rocks is lowest in basic and ultrabasic rocks (except for alkaline series rocks), and the highest in acidic rocks and alkaline rocks (such as granite and nepheline syenite). The performance of rare earth elements has ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/626
CPCG01N27/62
Inventor 赵赫余嘉昕陈力飞何焘潘勇胡兆初
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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