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Brief introduction of large-scale instrument analysis method-atomic absorption spectrophotometry

 Last Update: 2021-09-21
 Source: Internet
 Author: User

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Atomic absorption spectrophotometry is to measure the resonance absorption of light radiation energy by atoms in the ground state

The light source emits light with a specific wavelength of a certain element.

(1) The principle of atomic absorption (AAS)

(2) The characteristics of the atomic absorption method

(3) The composition of the atomic absorption spectrophotometer

(4) Quantitative method

1) Quantitative formula (based on Lambert-Beer law)

Molecular spectrum: A=εCL

Atomic spectrum: A=KNL=KC

In the formula, L——the thickness of atomic vapor;

N——the number of free atoms in the ground state;

K——Proportional constant;

C——The concentration of the measured element

2) Analysis method (standard curve method)

First make a standard curve

Related links: Introduction to large-scale instrument analysis methods-liquid chromatography

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