Water detection by TCD

Chromatography Forum: GC Archives: Water detection by TCD
Top of pagePrevious messageNext messageBottom of pageLink to this message  By Riccardo Cattaneo on Thursday, June 5, 2003 - 06:22 am:

I am trying to detect small water concentrations in a nitrogen stream by means of a TCD. The dew point is smaller than -40C. I am observing a negative signal when the water concentration gets very low. Does anybody have an explanation for it? Can I also calibrate the negative signals?

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