Select Peak Options (Reference Information)

"Select Peak" Options

Use the Select Peak variable of the Chromatogram category to select a peak in the chromatogram. The Select Peak variable opens the Peak Results category. Enter an option in the Formula field.

Note:

Instead of using the Formula field, you may as well click Parameter and select an option from the Select Peak drop-down list.

The meaning of the options is as follows:

"Formula": chm.peak(OPT, [Name, Number])

OPT = "By Number" (default):	Searches the chromatogram for the peak with the indicated number. Example: chm.peak("By Number," 1).area determines the area of the first peak in the chromatogram.
OPT = "By Name":	Searches the chromatogram for the peak with the indicated name. Example: chm.peak("By Name," "Benzene".)amount determines the amount of benzene in the sample.
OPT = "By Tab.Number":	Searches the chromatogram for the peak that was identified by the corresponding line in the peak table. Example: chm.peak("By Tab.Number," 2).height searches the chromatogram for the peak that was identified by the second line in the peak table, and then it determines its height.
OPT = "By Group":	Searches the chromatogram for the first peak in a specific peak group. Example: chm.peak("By Group," "CKW").amount searches the chromatogram for the first peak in the Group (Peak Group) called CKW and then determines its Amount.
OPT = "By SLS-Hit":	Searches the chromatogram for a peak for which at least one SLS hit is available. Example: chm.peak("By SLS-Hit," 2).hitSpec(1).name selects the second peak in the chromatogram for which at least one SLS hit is available. In addition, the name of the respective library spectrum with the best match is indicated.
OPT = "ISTD":	Searches the chromatogram for the Internal Standard peak. If there are several ISTD peaks, the number of the ISTD peak can be indicated by a second parameter. Example: chm.peak("ISTD").area searches the chromatogram for the first ISTD peak and calculates its area. chm.peak("ISTD," 2).area calculates the area of the second ISTD peak.
OPT = "Ref":	Searches the chromatogram for the reference peak (Retention Time Interpretation as Time Distance to ... or Time Ratio to...) For example: chm.peak("Ref").retention_time searches for the reference peak and then calculates the corresponding retention time.
OPT = "Condition":	Searches the chromatogram for the first peak for which the conditions becomes true. For example: chm.peak("By Condition","peak.area>10.000").retention_time searches for the first peak with an area larger than 10.000 and returns its retention time.