CHN Analysis

30 Apr 2018

Elemental analysis vendor

Submitted by Adam R. Johnson, Harvey Mudd College
Inorganic friends. Who do you use for CHN? My current vendor has gone downhill and I won’t use them again. My invoice on a rushed air sensitive sample was “not forwarded” and it is now a week later and only my follow up email prompted a response. In my more recent interaction with them, I had to email to request my data after it was not sent to me after a month or 6 weeks. Thanks.
19 Jun 2008

deuterium labeling in CHN analysis

Submitted by Adam R. Johnson, Harvey Mudd College

My student sent a labeled compound for CHN analysis.  Her data came back all wrong.  I remembered (in the dim recesses...) that when doing CHN analyses for deuterated compounds, you have to do something different.  But I have no idea what it is.  But, technology has advanced in the intervening years, so I had chemdraw automatically calculate numbers.

Chemdraw calcd for C14H15D6NO2:  %C:  69.67, %H:  11.27, %N:  5.80

Chemdraw calcd for C14H21NO2:  %C:  71.46, %H:  8.99, %N:  5.95

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