Page 31 - Shimadzu-MassSpectrometerCatalog

GCMS

Analysis of Diesel Fuel Using GC×GC-MS

GC×GC is state-of-the-art chromatography
technology that involves directly connecting two Software - LCMS -
different types of columns together to achieve
high separation levels. GC Image was used to
create two-dimensional results from analyzing
diesel fuel using a GC×GC-MS system, as
shown to the left. A high polarity capillary
column was used for the second column sepa-
rated aromatic hydrocarbons, which tend to
overlap with paraffins. These can be detected as
a blob distribution pattern that reflects the
compound structure. Software - GCMS -

2-Dimensional Image of GC×GC-MS Analysis Results for Diesel Fuel

AXIMA Software - AXIMA -

Analysis of Polyethylene Terephthalate (PET) Oligomer Using SEC-MALDI

Soxhlet extraction or precipitation methods
Recycled PET (cleaning utensil) are used to pretreat samples for oligomer
analysis, and HPLC, NMR, or MALDI-TOF
MS (particularly more recently) systems are
used for detection.
However, polymer materials are, by
Elution Time definition, a mixture of multiple compo-
nents, which means small amounts of System
components cannot be detected by simply
analyzing the extract with mass spectrom-
etry. Using this system, which combines
size exclusion chromatography (SEC) with
MALDI-TOF MS, enables detailed oligomer
Legend : -(m/n)-; linear oligomers analysis.
(m/n); cyclic oligomers An example of using this system to analyze
m; Number of terephthalic acid (TA) units
n; Number of ethylene glycol (EG) units a recycled PET product is shown.
Compared to oligomers in standard PET
polymers, a relatively broader distribution Application
of molecular weights was obtained and
more linear type oligomers were detected
from the recycled item.

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