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[Chemical Knowledge]：Principle Analysis of Atomic Absorption Spectrophotometer: Exploring the Secret of Elemental Analysis

Read： 696 Time：20months ago Source：Transform the World with Simplicity

With the continuous development of science and technology, more and more diversified instruments and equipment, elemental analysis has increasingly become one of the key steps in chemical analysis. Among them, atomic absorption spectrophotometer (AAS) is a commonly used elemental analysis method, its principle and application are extensive. So, how does AAS work? The following is a brief introduction to the principles of AAS and its application in elemental analysis.

1. Principle The principle of

AAS is to use the characteristics of specific element atoms to absorb electromagnetic radiation of a certain wavelength for elemental analysis. The core device in AAS is a flame furnace and a spectrometer. The flame furnace is used to convert elemental atoms in the sample into free atomic states to be detected, and the spectrometer is used to detect the specific signals generated by the converted atoms when they absorb electromagnetic radiation of specific wavelengths. Therefore, AAS determines the content of an element by measuring the intensity of the electromagnetic radiation it absorbs in the flame.

Specifically, the workflow of AAS is as follows: the sample to be tested is sent into a flame furnace and ignited in the furnace with fuel and oxygen to generate heat energy in the furnace and convert atoms in the sample into free atomic states to be detected; Subsequently, electromagnetic radiation is passed through the furnace, the radiation range of the furnace is detected by a spectrometer, and the content data of the target element in the sample can be obtained by calculating AAS.

2. Application

AAS has a wide range of applications in chemical analysis, can be used in oil and gas, electronic materials industry, food hygiene and other fields. As a fast, accurate and precise elemental analysis method, AAS has many advantages, such as high detection sensitivity, wide measurement range, less destructive of the tested substances, and accurate analysis results.

The following is a brief introduction to the application of AAS in different fields:

1. In the oil and gas industry, AAS is widely used to analyze the content of elements in oil and water, and can detect the content of various elements, such as lead, cadmium, chromium, manganese and other elements.

2. In the electronic materials industry, AAS can be used to analyze materials containing toxic elements, such as lead.

3. In the field of food hygiene, AAS can detect the content of heavy metals and other elements in food, such as copper, zinc, cadmium, lead and other elements.

AAS is a unique and popular elemental analysis method in chemical analysis. Through the analysis of the principle and application of AAS, we have a deeper understanding in the field of elemental analysis, which is helpful to better use and innovate AAS technology and better serve the production and life of human beings.