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仪器网/ 行业应用/ 解决方案/ FTIR使用全真空类型进行气体分析

FTIR使用全真空类型进行气体分析

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Gas Analysis System using Full Vacuum Type FT/IR
(Trace amount of H2O in N2 gas)
(1/2)
No. 230TR0187-E
The analysis of low concentration gases using long pathlength gas cells has been reported previously, however, it can be difficult
to accurately quantitate gases at low concentrations when the absorption peaks of the target gas overlap with the peaks of
atmospheric water vapor or, when the target gas itself is H2O or CO2, which are presnet in the atmosphere. This is because even
with a vacuum FT-IR instrument, it was not possible to evacuate the sample chamber with the long pathlength cell present. The full
vacuum gas analysis system introduced in this application note has a special gas cell integrated into the sample chamber, allowing
the entire light path to remain under full vacuum with the gas cell in place. This full vacuum model makes it possible to quantitate
concentrations of H2O even at the 0.1 ppm level.
For the measurement, there are separate vacuum lines for evacuation of the FT-IR instrument and the gas cell, with independent
evacuation capability for the separate components. Adding a vacuum gauge to the gas cell makes it possible to control extremely JASCO傅立叶变换红外光谱仪FT/IR-6000 JASCO FTIR-4000傅立叶变换红外光谱仪 jascoRFT-6000傅立叶变换红外拉曼光谱仪
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