neutral loss of 86

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neutral loss of 86

April 13, 2012, 04:29:35 PM

Hi all,
Over the last few months I have been trying to identify metabolites from human plasma. I continually see neutral losses of 86. I have search the literature and haven't come across anything that makes sense with human samples. If anyone has suggestions I'd appreciate it.

Thanks!

Re: neutral loss of 86

Reply #1 – April 14, 2012, 03:39:45 AM

Do you have a more exact mass? Without some more digits it is impossible to tell for sure.
I have observed [M-CO2-C3H6] at 86.0368.
If you have exact mass you can use the Rdisop package for R to get an idea of the possibilities (http://www.bioconductor.org/packages/2. ... disop.html).

Like this:
decomposeMass(43.99, ppm=20, mzabs=0.01)

Re: neutral loss of 86

Reply #2 – April 16, 2012, 10:15:48 AM

Unfortunately I only have accurate mass on the parents. I used a TOF and then an IT for MS/MS. I will keep that in mind, thanks.