ChromatoProbe
Sample Introduction Device
The Varian ChromatoProbe sample introduction device is
an upgrade to the 1079 PVT for the Varian GC/MS systems.
Solids can be loaded into the sample microvial and analyzed
by GCMS using any of Varian's powerful analytical modes
(EI or CI full scan; EI-SIS; EI or CI MSMS). With precaution,
liquids, solutions and even slurries can be handled by the
ChromatoProbe.
Low Risk Sample Introduction
The operator never "breaks vacuum" in the MS
- meaning no costly vacuum interlock or concerns about leaks.
There is no need to worry about source alignment and loss
of performance because the source is not reconfigured when
solid samples need to be analyzed.
Finally, nonvolatile or thermally degraded components from
the sample remain in the ChromatoProbe vial and can never
contaminate the source.
Controlled Sample Delivery
Sample delivery to the MS can be adjusted either by injector
temperature or split flow ratios - avoiding problems due
to an overloaded MS source. Mixtures can be separated by
a combination of temperature programming in the injector
and the GC column - leading to less confusion when the sample
turns out to be a mixture.
How It Works
Held by the tip of the ChromatoProbe, a microvial
containing the solid sample is inserted into the injector
body. The injector Temperature is programmed to vaporize
the sample for transfer to the MS.
The GC column is programmed for thermally labile samples
and better separations or kept at a high temperature for
rapid analysis and high boilers.
Conversion To ChromatoProbe
Converting to the ChromatoProbe interface involves only
(1) switching the Septa nut with the ChromatoProbe guide,
(2) changing the injector insert, and
(3) changing the column.
Adding a second injector devoted to the ChromatoProbe device
simplifies the conversion to a simple column change.
Added Versatility for Your GCMS
Even compounds that normally are not considered
amenable to GCMS analysis can be investigated with the ChromatoProbe.
For example, see Application
Note 56 for the detection of 2,4,5-trichlorophenoxyacetic
acid in a soil sample.
|
