POLARIS GC/MS

Full scan EI ANALYSIS key applications: • Industrial
• Environmental
• Residue
Industrial Alcohols
100
100
50
0
0
s s
TIC
1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2 4.4 4.6 4.8 5.0 5.2
Time (min)
100
80
60
40
20
0
Full Scan
EI/MS
41.1
43.1
39.1 45.1
55.1
59.0
73.0
Full scan analysis gives the analyst complete confidence, with NIST library identification
and superior quantitation.
3.43
3.52
3.66
40 50 60 70 80 90 100 110 120 130 140 150
m/z
40 50
55 58
57
50 53 60
60
3.77
69.1 74.1 85.1
84.1 87.1 101.1
Industrial raw materials such as alcohols and ketones can be analyzed without the presence of
ion-molecule reactions which typically cause misidentification by all other ion traps.
Validated compound identification
NIST library
confirmation
36 39
4143
42 45
44
59
67 69 71 74
70
73
80
83
85
87
OH
3.91
3.99
101
90 100
2-methyl-3-pentanol
2-methyl-3-pentanol
110
Ion trap detectors are well known for
their superb sensitivity in the full scan
mode. The analyzer acts similar to an
absorption trap in that the target
analyte concentration builds up over
time (milliseconds) until the
population of ions fills the detector to
capacity. The ions are then expelled
into the electron multiplier for
identification and quantitation.
In this way the ion signal is much
stronger than other types of
mass spectrometers.
In addition to the obvious sensitivity
increase, ion traps also have superb
selectivity for removing unwanted
background interferences. Ion trap
detectors have the ability to select
which ion masses are trapped by the
detector and which ions are allowed to
pass through and not be counted. All
of the storage capacity of the detector
is optimized for the target analytes
and not the matrix. This is especially
useful when measuring PCBs or
dioxins in sludge, drugs in biological
fluids, pesticide residues in fruits and
vegetables, and other difficult
applications.