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Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: Winga on August 21, 2004, 11:52:57 AM

Title: What is the use of liquid nitrogen in NMR Spectrometer?
Post by: Winga on August 21, 2004, 11:52:57 AM

Is it used for cooling down the system or providing a low temperature condition for electron delocalization in superconductor?

Title: Re:What is the use of liquid nitrogen in NMR Spectrometer?
Post by: Mitch on August 21, 2004, 09:56:17 PM

yes

Title: Re:What is the use of liquid nitrogen in NMR Spectrometer?
Post by: Winga on August 22, 2004, 12:59:27 AM

Both?

Title: Re:What is the use of liquid nitrogen in NMR Spectrometer?
Post by: Mitch on August 22, 2004, 04:37:00 PM

superconductivity.

Title: Re:What is the use of liquid nitrogen in NMR Spectrometer?
Post by: Winga on August 22, 2004, 07:54:30 PM

That mean NMR Spectrometer does not generate much heat, right?

And why the superconductor generates a current only in very low temperature?

Title: Re:What is the use of liquid nitrogen in NMR Spectrometer?
Post by: Mitch on August 22, 2004, 08:48:36 PM

Do metals "in general" conduct electricity better at lower or higher temperatures?

Title: Re:What is the use of liquid nitrogen in NMR Spectrometer?
Post by: Winga on August 25, 2004, 05:47:45 AM

Quote from: Mitch on August 22, 2004, 08:48:36 PM

Do metals "in general" conduct electricity better at lower or higher temperatures?

Lower temp.


In normal conditions, can superconductor itself generate electric current or not?

Title: Re:What is the use of liquid nitrogen in NMR Spectrometer?
Post by: celan on September 20, 2004, 09:49:39 PM

 The liquid nitrogen with  liquid He together   providing a low temperature condition for  superconductor.