Method for determining content of lanthanum, cerium, praseodymium, neodymium and samarium in iron-containing dust sludge

Abstract

The invention discloses a method for determining content of lanthanum, cerium, praseodymium, neodymium and samarium in iron-containing dust sludge. The method comprises the following steps: preparing a standard solution containing lanthanum, cerium, praseodymium, neodymium and samarium, preparing a rhodium internal standard solution, preparing a blank test sample with dissolved high-purity iron sample, and preparing a to-be-detected test sample with dissolved iron-containing dust sludge sample; introducing the standard solution into an inductance coupling plasma mass spectrometry to be measured to obtain a concentration calibration curve, then testing the blank test sample solution and the to-be-detected test sample solution in the inductance coupling plasma mass spectrometry, determining the concentration of the lanthanum, cerium, praseodymium, neodymium and samarium in the blank test sample and the to-be-detected test ample as CiO and Ci according to the concentration calibration curve, and then calculating the content of each element in the iron-containing dust sludge to-be-detected test sample according to the concentration difference value (Ci-CiO). The method has the characteristics of high sensitivity, high determination speed, simplicity in operation and small interference.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgical analysis, in particular to a method for measuring the contents of lanthanum, cerium, praseodymium, neodymium and samarium in iron-containing dust. Background technique [0002] Lanthanum, cerium, praseodymium, neodymium and samarium are the main rare earth elements in Baotou mine. It is often lost into iron-containing dust such as tailings, fly ash, and iron slag in the process of ore dressing, steelmaking, and ironmaking. It is a component that can be recycled in steelmaking production. important. However, there is currently no method for the detection of rare earth content in iron-containing dust, especially for the detection of the respective content of each rare earth element. [0003] So far, there are many methods for the determination of rare earths, such as the oxalate gravimetric method, the chlorophosphine-III photometric method, and the EDTA volumetric method. The...

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Problems solved by technology

However, there is currently no method for the detection of rare earth content in iron-containing dust, especially for the detection of the respective content of each rare earth element.

[0003] So far, there are many methods for the determination of rare earths, such as the oxalate gravimetric method, the chloro

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