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Esmaeil Sadroddiny 10-23-2008 04:39 PM

ppm in mass spectrometry
 
Can somebody explain simple definition from ppm in mass spectrometry

Regards
Esmaeil




Han 10-24-2008 11:33 AM

ppm in mass spectrometry
 
Esmaeil Sadroddiny <[Only registered and activated users can see links. Click Here To Register...]> wrote in
news:[Only registered and activated users can see links. Click Here To Register...]. net:

p parts
p per
m million

Usually weight/weight, AFAIK
--
Best regards
Han
email address is invalid

Dr Engelbert Buxbaum 10-26-2008 05:31 PM

ppm in mass spectrometry
 
Am 23.10.2008, 12:39 Uhr, schrieb Esmaeil Sadroddiny
<[Only registered and activated users can see links. Click Here To Register...]>:


Are you sure you are talking about MS? ppm usually occurs in the context
of nuclear magnetic resonance (NMR) spectroscopy where it denotes the
chemical shift of a signal with respect to some reference compound. I.e.,
if the reference signal is at 400 MHz, a 1 ppm signal would be at 400.0004
MHz.

iknew 05-14-2010 05:36 PM

Re: ppm in mass spectrometry
 
can sombody help with converting cubic centimeters to ppb or is that even possible?

iknew 05-14-2010 05:37 PM

Re: ppm in mass spectrometry
 
:order::thankyou:


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