INFICON Explorer Portable Gas Chromatograph - Manual (Page 286)

Assay 1 User Notes
284
Co-elutions
Assay Wizard runs automatically when you load an assay that contains co-elutions.
It will prompt you to select one compound from a list of possible co-elutions.
1. Select a single compound of interest from each list.
2. Save this modified application file to a different filename.
NOTE: Bypassing Assay Wizard may result in co-eluting compounds being misidentified by
Explorer.
Whether or not a compound pair will co-elute will depend on the instrument and the
relative concentrations of the components within the sample. Often co-elutions can
be resolved by modifying the standard method, if the sample matrix permits.
There are 5 possible co-elutions on Column B:
1,2-dichloropropane and 1,2-dichloroethane - These compounds are separated
on Column C, using the standard method.
Toluene and tetrachloroethylene - These compounds may be separated by
modifying the Column B method.
They could also be analyzed on Column A.
Tetrachloroethylene can be quantified on the ECD if an ECD has been
installed.
2-Choroethyl vinyl ether and cis-1,3-dichloro-propene - These compounds are
separated on Column A using the standard method, and may by separated by
modifying the Column B method.
m-Xylene and p-xylene - These compounds cannot usually be resolved.
You can try modifying the Column B method to separate these compounds, but
that may in turn effect other separations.
o-Xylene and chlorobenzene - These compounds may be separated by
modifying the Column B method.