Variable

Formula

Description

Number

peak.number

Number of the peak

Name

peak.name

Name of the peak

Group

peak.group

Name of the peak group

Link Count

peak.linkCount

Number of substances assigned in one peak

Retention Time

peak.retention_time

Time (in minutes) that have passed since the injection

Retention Deviation

peak.retention_deviation

Deviation in [min] or [%], depending on parameter (abs or rel)

Relative Retention Time

peak.rel_retention_time

Quotient of the peak retention time and the retention time of the reference peak

Retention Window Width

peak retention windows

Width of the Retention Window

Area

peak.area

Peak area  between the signal curve, the baseline, and the perpendicular delimiters

Relative Area

peak.rel_area

Portion of the peak area in the sum of all peak areas (total area)

Group Area

peak.groupArea

Total of the peak Group areas

Height

peak.height

Peak height at the retention time

Relative Height

peak.rel_height

Peak height relative to the average height of a certain peak group or a specific peak

Group Height

peak.groupHeight

Total of the heights of the peak Group

Amount

peak.amount

Result of amount calculation, either as concentration value or as an absolute amount

Amount Deviation

peak.amount_deviation

Deviation analogous to Retention_Deviation

Concentration

peak.concentration

 (if Amount is really an amount): quotient of the calculated amount and the injection volume

Relative Amount

peak.rel_amount

Amount portion of a peak relative to others

Group Amount

peak.groupAmount

Peak Group amount

Width

peak.width

Peak width extrapolated on the baseline at defined height.

Left Width

peak.left_width

Left section that is created if a perpendicular line is dropped to the baseline from the peak maximum

Right Width

peak.right_width

Right section that is created if a perpendicular line is dropped to the baseline from the peak maximum

Peak Start Time

peak.start_time

Shows the peak start time in [min]

Peak Stop Time

peak.stop_time

Shows the peak stop time in [min]

Signal Value at Peak Start/
Signal Value at Peak End

peak.start_value
peak.stop_value

Signal Value at Peak Start, for UV detectors in [mAU]

Signal Value at Peak Retention

peak.sig_value

Signal Value at Peak Retention, for UV detectors in [mAU]

Baseline Value at Peak Start/
Baseline Value at Peak End

peak.start_value_baseline
peak.stop_value_baseline

Baseline Value at Peak Start, for UV detectors in [mAU]

Baseline Value at Peak Retention

peak.sig_value_baseline

Baseline Value at Peak Retention, for UV detectors in [mAU]

Detection. Code at Peak Start/End

peak.start_detection_code
peak.stop_detection_code

Classification of the peak start and end (AIA peak type)

Type

peak.type

Peak type determined by Chromeleon

Modified

peak.modified

Modified peak?

Manually Assigned

peak.assigned

Manually assigned peak?

Resolution

peak.resolution

Resolution as a measure of the separation between two peaks

Asymmetry

peak.asymmetry

Asymmetry as a measure of peak fronting or tailing

Theoretical Plates

peak.theoretical_plates

Theoretical plates as a measure of the separation capability of the column

Skewness

peak.skewness

Skewness as a measure of the column quality

Signal-to-Noise-Ratio

peak.sn("Current")

Quantification accuracy of components

Statistical Moments

peak.moment("Mx")

Statistical moments as a measure of the chromatographic separation

With x =

0

Zero moment = peak area

1

First moment = averaged retention time

2

Second moment = retention time variance

K'

peak.kValue

Ratio of the net retention time to the dead time

Retention Index

peak.ri

Linear retention index calculated by Chromeleon

Kovats Index

peak.ki

Kovats index calculated by Chromeleon