1. Elimination and suppression of ionization interference: interference caused by the ionization of atoms in the vapor phase of a flame or plasma. It reduces the number of neutral atoms in the analytical element in the flame, thus reducing the analytical signal. Excessive ionizing elements are added to the standard and analytical samples to stabilize the free electron concentration in the flame or plasma at a relatively high level, thereby inhibiting or eliminating ionization of the analytical elements. In addition, the higher the temperature, the greater the degree of ionization, so lowering the temperature also reduces ionization interference. 2. What are the main effects of the acidity of the reagent on the ICP-AES method? The acidity of the solution mainly affects the rate of increase and atomization efficiency. The intensity of most elements in the acidic medium is lower than that of the aqueous solution; as the acidity increases, the intensity of the line decreases remarkably; the effects of various inorganic acids are not the same. The following sequence is incremented: HCl HNO3 HClO4 H3PO4 H2SO4; the change in line intensity is proportional to the change in lift rate. Therefore, in the ICP test, H3PO4 H2SO4 should be avoided as much as possible. Whenever possible, use hydrochloric acid or nitric acid as a medium. 3. The main types of spectral interference in the ICP-AES method: 1 line interference, the most common is rare earth analysis, especially the rare earth purity analysis, spectral line interference is quite serious, for spectral line interference, we generally choose to replace the line, because the full spectrum ICP spectrometer is on the selection line Taboo, for rare earth purity analysis, it is generally better to use sequential scanning type instruments. The band system interferes with the analysis of the spectral line, and is generally a line of change. 2 continuous background to the analysis of spectral line interference, the most common mineral analysis, the matrix is ​​more complex, although the spectral line is not much, but the continuous background is very strong, this time, the general instrument has a buckle background function, use this Features can be eliminated. 3 matrix interference, strictly speaking, matrix interference is physical interference rather than spectral interference. Commonly used complex samples, partial metal purity analysis, etc., the substrate dry has a variety of ways to influence, the most important is to affect the rate of increase and atomization efficiency. The method of eliminating matrix interference is very simple, that is, the matrix matching method or the standard addition method. When there are many samples, the matrix matching method is mostly adopted. 4 suppression of interference, in fact, is a kind of matrix interference, the existence of a certain matrix may affect the excitation of the element to be tested, sometimes it is inhibition, but sometimes it will enhance the strength of the element to be tested, whether it is weakened or enhanced. Not what we need, the way to eliminate this interference is also matrix matching or standard addition. This article is reproduced from: http:// Microscope spare part Microscope Spare Part,Abbe Refractometer,Esd Microscope Lamp,Stereo Microscope Esd Light NINGBO VANCO INSTRUMENT CO.,LTD , https://www.vancoscope.com