Problem; How to identify Phenanthrene D in the Gas Chromatograph Mass Spectrum
How are you
Fine, Thank you.
Sensei said to count Phenanthrene D. Get area values of phenanthrene D, then get ng/g data of PAHs (F1b+2).
This is just a process
Phenanthrene D and Phenanthrene is it same m/z ??
No, it isn’t
Please inform me the M/z of Phenanthrene D I am also searching on the web.
It’s very simple not difficult at all.
Please look at your std measurements chromatogram data
There is a peak of that Phenanthrene D in the chromatogram.
But in the spectrum data, I found two peaks of the standard sample at m/z 66, for the first peak m/w is 356 and 2nd has m/w 388 for C22D46 and C24D50 respectively.
If I remember correctly, it’s m/z is close to Phenanthrene.
You must have 3 peaks in your std, must not you?
Send me a picture of the TIC chromatogram of the std
No, this Picture is EIC
Don’t send EIC
I have found a peak for m/z 188?
Is the Phenanthrene D have the m/z 188??
Which peak is it?
Check out the peak around 12min
Yes, that peak elutes in 12.5 min
What time does Phenanthrene D elute?
In 12.44 min
Then m/z; 188, that peak, must be Phenanthrene D
Ok great but if I extracted by the EIC then area value reduced why??
but the pattern is the same.
Because it’s not TIC. For details, Check the difference between TIC and EIC on Google.
What is an abbreviation for tic and EIC?
TIC total ion chromatogram
and EIC means Extracted Ion Chromatogram
EIC can be said partial IC
Tic is total ic
Total includes partial
thanks a lot
So, Finally, m/z;188 is the Phenanthrene D if we extract whatever EIC or TOC and is very close to Phenanthrene.
Note; Phenanthrene elutes at m/z; 178 and Retention time is 12.4 min in the GC chromatogram.