Understanding Your Agilent ChemStation 221
Using the ChemStation Reports
10
Report Styles
For uncalibrated methods, the report parameters include the peak number,
retention/migration time, peak area, peak height, signal description, true
half-height peak-width (see also “True Peak Width Wx [min]” on page 246),
symmetry, k’, efficiency (plates) and resolution for each peak.
For calibrated methods, the report parameters include the peak number,
retention/migration time, compound name, amount, signal description, true
half-height peak-width, symmetry, k’, efficiency (plates) and resolution for
each peak.
The half-height peak calculation is not the same as the more complex peak
width formula used by the integrator. The values of efficiency and
resolution are based on this calculated peak width. The report header
consists of all method relevant information, including instrument,
column/capillary, sample, and acquisition parameters. The signal is also
plotted.
• Performance + Noise- Combines the Performance report style with the noise
calculations for the noise ranges defined in the Edit Noise Range dialog box
of the System Suitability menu. In addition, the noise, given as six times the
standard deviation, as peak-to-peak, and as ASTM noise.The drift and
wander is also determined.
• Performance + Extended- Produces an extended report with all the
parameters from the peak performance calculations and individual plots of
each peak. The plots include the baseline, the tangents, and the peak widths
at defined heights. This report type includes only calibrated peaks.
In addition to the parameters printed for the Performance report style,
more Peak Performance Parameters are determined: the peak start and end
peak times, skew, excess, peak width, USP tailing factor, time interval
between data points, number of data points, statistical moments, plates,
plates per meter, selectivity and resolution of each peak are printed. The
peak width, plates, plates per meter, selectivity, and resolution are
calculated by the true half height, 5 sigma, tangent and tailing methods
(please refer to “Performance Test Definitions” on page 244 for details).
The report header consists of all method relevant information such as
instrument, column/capillary, sample and acquisition parameters and a
plot of the signal. For a complete list of the peak performance parameter
algorithms see “Performance Test Definitions” on page 244.
The spectral report styles (Short + Spectrum, Detail + Spectrum, Performance +
Library Search) are described in Understanding Your Spectra Module.
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