PerkinElmer TORION T-9, Руководство пользователя

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What is low thermal mass (LTM) gas chromatography? . 33
their relative retention times. Peaks that are partially resolved or totally unresolved are referred to as
co-eluting peaks.
In some cases it is not possible to achieve complete resolution. It not uncommon to find cases
where two peaks will almost completely overlap. Using mass spectrometry adds the element of
mass spectral data to the analytical equation. Using sophisticated deconvolution algorithms (see the
software section of this manual for a detailed description of deconvolution) that rely on only a small
amount of resolution and mass spectral finger print recognition can provide a way of identifying and
quantifying analytes that co-elute.
Low thermal mass (LTM) GC refers to a miniaturized form of GC in which the convectively heated
column oven is replaced with direct electrical resistive heating of the capillary column. LTM GC uses
a conventional GC column that is intertwined with resistive heating and temperature-sensing wires
and wrapped with aluminum foil for greater heating efficiency. The low thermal mass of this column
heating arrangement allows for much smaller instrumentation and lower operating power as well as
faster heating and cooling of the column. The GC in the Torion T-9 GC/MS is an LTM GC.