Agilent Technologies 8453 Operator's Manual page 298

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Agilent ChemStation Features
About the ChemStation Software
• capacity factor (k'),
• peak area,
• peak height,
• symmetry,
• true peak width at half height,
• efficiency in plate numbers,
• resolution, and
• selectivity.
For calibrated methods the compound name and amount replace the peak
area, height and selectivity columns.
The report header includes the standard header and footer, sample
information block, the analytical column parameters and optionally a plot of
the chromatogram/electropherogram.
The Performance and Noise style adds an evaluation of the signal noise, in up to
seven user-defined evaluation ranges, to the data from the Performance report
style. The noise parameters are reported as signal to noise ratios for each peak
or calibrated compound and a noise table for each signal. Each noise table
includes noise calculated by the six times standard deviation, peak to peak
and ASTM methods as well as the wander and drift.
The Extended Performance style adds plots of each individual peak graphically
showing the peak start and stop times, half width and baseline. This style
includes the following parameters in addition to the ones reported by the
standard Performance reports:
• area, height and amount,
• skew,
• excess,
• usp tailing factor,
• time interval between data points and number of data points over the peak,
• statistical moments (M0 to M4),
• peak width at half height calculated by the true, five sigma, tangent and
• plate/column and plates/meter calculated by the peak width at half height,
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tailing methods, and
five sigma, tangent and statistical methods.
Understanding Your Agilent ChemStation