The process of spectral analysis is the introduction of the sample into the light source, the energy of the sample, the sample evaporation into gaseous atoms, and the outer layer of the gaseous atoms excited by the low energy state, in which the atoms are very unstable to the ground state or low energy state, then produced radiation.
The spectrum or spectral analysis instrument is generally referred to as an optical spectrum analyzer. From its appearance, it can be divided into line, band and continuous spectrum. Line spectra are generated by atomic or ionic excitation in the gas state. If it is an atom, it is called an atomic spectrum. If it is produced by ions, it is called the ion spectrum. And the band spectrum comes from the excited gas molecules. If used in spectral analysis of carbon electrode at high temperatures can combine with the nitrogen in the air to generate cyanide (CN) molecules, when cyanide molecules in the arc is excited after spectral bands, said with cyanide. When the material is liquid or solid at high temperature, a continuous spectrum is produced. Such as common incandescent lamp, burning red iron electrode, etc.. They are emitted by a continuous spectrum. These spectra are not used to analyze.
According to the nature of electromagnetic radiation, the spectrum can be divided into atomic and molecular spectroscopy. According to the transfer of the radiation energy can be divided into emission, absorption, luminescence and Lehmann spectra, etc.. We used to talk about the spectral analysis of the essence is to refer to the atomic emission spectrum analysis". The spectral range of the emission spectrum is about 8500 into a 1600.
Due to the analysis of samples containing different atoms will produce different wavelengths of radiation, for produced by radiation through the spectrograph of light would be on a photographic plate are arranged according to the order of the wavelength of regular spectral line, through observation instrument identification characteristic wavelengths of spectral lines is the qualitative analysis of the spectra. If the spectral analysis instrument is further measured is a quantitative analysis of the spectrum. Wuxi Jiebo Electrical Technology Co. Ltd.
