Biomedical Engineering Reference
In-Depth Information
RT: 12.65
10.85
BMW 8%MC 200°C
7.59
Guaiacyl
9.16
10.40
11.46
RT: 11.25
Relative Abundance
Syringyl
12.53
13.52
13.92
14.40 1 4.9 5
15.51
7.5 8.0 8.5 9.0 9.5 10.0
10.5
11.0
11.5
12.0
12.5
13.0
13.5
14.0
14.5
15.0
15.5
Time (min)
FIGURE 13.7 Pyrogram ball milled wood hot-pressed poplar (200 C at 8% moisture content).
Source: From Osman (2010).
then detects the number of ions with a specific mass. A mass spectrum is
created using this information. It is essentially a graph of the number of ions
with different masses that passed the filter. The graph from a Py-GC/MS
contains the mass on the x-axis and its abundance on the y-axis
( Figure 13.7 ).
Users can compare the mass spectrum of an unknown compound with a
database of known compounds to identify them. This, however, needs extra
care because the identification of a compound could be misleading or
difficult.
Search WWH ::




Custom Search