How to treat the analysis of spectral analysis instruments?

Spectrum analyzer is an instrument used to measure the radiation spectrum of luminous body, that is, the index parameters of luminous body itself. Spectral analysis is to identify the existence of some elements from their characteristic spectra (qualitative analysis), and the intensity of these spectral lines is related to the content of the element in the sample, so the content of the element can be determined by the intensity of these spectral lines (quantitative analysis).

classify

According to the working principle of modern spectrometer, spectrometer can be divided into two categories: classic spectrometer and new spectrometer. Classical spectral instruments are instruments based on the principle of spatial dispersion; The new spectrometer is based on the modulation principle, while the classic spectrometer is a slit spectrometer. The modulation spectrometer is non-spatial, and it uses a round hole to enter light. According to the principle of dispersion module, spectrometer can be divided into prism spectrometer, diffraction grating spectrometer and interference spectrometer.

principle

The analysis principle of the spectrum analyzer is that the characteristic spectrum of the element to be measured radiated by the light source is absorbed by the atoms in the ground state of the element to be measured in the sample vapor, and then the content of the element to be measured in the sample is obtained by the attenuation degree of the emission spectrum, which conforms to Lamper-Beer law, and A= -lg I/I o= -LgT = KCL, where I is the transmitted light intensity, I0 is the emitted light intensity, T is the transmittance, and L is the optical path of light passing through the atomizer.