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一、红外线气体分析仪的简单原理:有些多原子气体分子,如果把它们放置在红外线光谱区的电磁辐射场内,就会受到激发而发生转动或振动,仅当红外线的频率与被照射的气体分子的振动或转动频率相一致时,这种分子才能吸收红外线的辐射能。所以各种不同物质所组成的气体,并不是对所有的红外光谱范围内的波段都有吸收红外线的能力,而是具有选择性,在不同的分子混合物中只能吸收某一波长范围或某几个波长范围的红外线辐射能(如图一所示)。有些气体能吸收红外线,如:CO,CO_2,CH_4……等,而另一些气体如:N_2,O_2,H_2,Ne,
First, the simple principle of infrared gas analyzer: Some polyatomic gas molecules, if placed in the infrared spectral region of the electromagnetic radiation field, it will be excited to rotate or vibration occurs only when the infrared frequency and the irradiated gas When molecules vibrate or rotate at the same frequency, they can absorb the infrared radiation. Therefore, a variety of gases composed of different substances, not all of the infrared spectral range of the band have the ability to absorb infrared, but rather selective, in a mixture of different molecules can only absorb a certain wavelength range or a few Infrared radiation of a wavelength range (as shown in Figure 1). Some gases can absorb infrared light, such as: CO, CO_2, CH_4 ......, etc., while other gases such as: N_2, O_2, H_2, Ne,