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Features of infrared absorption analyzer

Release time: 2019-12-31 11:07:06 Click: 1714

L 为定值时,如能测得纭和即可换算出混合气体中被测物质的浓度。 From Lambert- Beer's law, it can be known that when a specific wavelength and the length L of the absorption cell are selected as constant values, the concentration of the substance in the mixed gas can be converted if the chirp can be measured. This is the basic principle of the legal content of infrared absorption. But because the measurement is very difficult, the infrared gas analyzers we currently use come from the dual optical path system to obtain the gas concentration by a comparative method.

红外吸收分析仪的特点

Features of infrared absorption analyzer

Lambert. Beer's law has a wide range of applications, not only in the infrared band, but also in the ultraviolet and visible light bands. It has the following characteristics for infrared band:

红外吸收是有条件的。 1. Infrared absorption is conditional. According to molecular theory and a large number of experiments, it is proved that the molecule is constantly moving, and the inside of the molecule is constantly vibrating. Only the vibration with the dipole distance changing can absorb the infrared spectrum. 02 、)等,它们在振动过程中无偶,极距度化,因而不吸收红外光用红外法测定碳硫的体系中,虽有足量的氧气存在,由于不吸收红外线所以不干扰测定。 Monoatomic molecules (eg, homonuclear diatomic molecules (eg, 02 ,), etc.) are uncoupled during the vibration process and polarized, so they do not absorb infrared light. A sufficient amount of oxygen is present and does not interfere with the measurement because it does not absorb infrared rays.

红外吸收是有选择性的。 2. Infrared absorption is selective. Polyatomic gas molecules, after being irradiated with infrared rays, will accelerate vibration and rotation. Different substances have their own specific vibration or rotation rate. However, only when the rate of infrared light is consistent with the specific rate of the molecule itself can the molecule absorb the radiant energy of the infrared spectrum. C02 SO, 气体,在特定的波长( c 4 26 50 74 )有最大吸收的条件下测定的。 Therefore, it is selective. The infrared method for measuring carbon and sulfur is to oxidize the sample at high temperature to convert carbon and sulfur into polyatomic C02 and SO. The gas has a maximum at a specific wavelength ( c is 4 , 26 , and 50 is 74 ). Measured under absorption conditions.

3 )红外吸收的能量较大,这样大量的热能经过转换后,可用检器进行检测,从而确定待分析组分的浓度。 ( 3 ) The energy absorbed by the infrared is large, so that after a large amount of thermal energy is converted, it can be detected by a detector to determine the concentration of the component to be analyzed.

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hot key words:

Direct Reading Spectrometer

High frequency infrared carbon and sulfur analyzer

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Portable spectrometer

Photoelectric direct reading spectrum analyzer


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