ICP Atomic Emission Spectrometry Analysis of Chemical Composition of NdFeB Magnets

Analysis Methods of NdFeB Magnets

The chemical composition analysis of NdFeB Magnets generally includes:

1- Chemical composition analysis of raw materials, including the chemical composition of rare earth metal raw materials, as well as the chemical composition of industrial pure Fe, B-Fe alloys and other metals, such as Ga, Al, Nb, Zr, etc.;

2- The chemical composition of the magnet. The analysis is required for unknown magnets or problems with magnets, not necessary if the product is of normal quality. The chemical composition of the magnet includes rare earth metal elements, such as Nd, Pr, Ce, Dy, Ho, Gd, Tb, etc., and other metal elements, such as Cu, Al, Nb, Zr, Ga, Co, Ti, etc.;

3- Content analysis of other non-metallic elements, such as hydrogen, oxygen, carbon and other elements content analysis.

ICP emission spectroscopy is an analytical method that combines Inductively Coupled Plasma (ICP) and Atomic Emission Spectroscopy (AES).

Principles of ICP

The atoms or ions of the measured elements are excited in the light source to generate characteristic radiation. The ICP conducts a qualitative and quantitative analysis of each element by judging the existence and intensity of these characteristic radiations.

The ICP emission spectrum analysis process has the following three steps: emission, spectroscopy and detection.

1- Using plasma emission light source (ICP) to vaporize, dissociate or decompose the pattern into atomic states, atoms may be further ionized into ion states, and atoms and ions are excited to emit light in the light source;

2- Use a spectrometer to decompose the light emitted by the light source into a spectrum arranged by wavelength;

3- Using the photoelectric device to detect the spectrum, the samples were qualitatively analyzed according to the wavelength obtained by the measurement, and quantitatively analyzed according to the emission intensity.

Elements that Can Be Analyzed by ICP

Among the 109 elements in the periodic table, 74 elements can be measured by ICP emission spectrometer, including 3d, 4d, 5d transition metals and La-series rare earth metals. The undetectable elements are fluorine, helium, noble gas elements, carbon elements, Oxygen, nitrogen, hydrogen and all radioactive elements.

Types of ICP Emission Spectrometers

ICP emission spectrometers are divided into three categories according to different excitation types and detection systems:

1- Inductively coupled plasma emission spectrometer (ICP for short), including sequential scanning type, multi-channel simultaneous type, full-spectrum direct reading type, etc.

2- Spark/arc direct reading spectrometer, referred to as direct reading spectrometer, including large-scale and portable

3- Spectrograph

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