Technical data

Understanding Your Agilent ChemStation 217
Using the ChemStation Reports
10
Quantitative Results
Quantitative Results
The report type is identified by the name of the calculation method used to
prepare it, for example, an ISTD report. Each type is briefly described below.
The calculations for each report are given in “Quantitative Results” on
page 217.
Area% provides the simplest report and requires no calibration data since no
correction is made for the difference in detector response of sample
components. The Area% report is particularly useful in developing a
calibration table for use with the other report options. This report is suitable
for analyses in which the difference in detector response of the components is
not significant.
Height% gives a report similar to the Area% report except that peak height is
used for the calculations instead of peak area.
Norm% gives a report in which each component is reported as a percentage of
all the components present. The peaks are corrected for detector response
before calculation of the percentage of each.
ESTD produces a report of the actual amount of each substance in whatever
units you choose. Amounts are calculated using a previously established
calibration table. The use of an external standard requires that the injected
volume of the calibration mixture be known.
ESTD% produces a report of the relative amount of each substance as a
percentage of the injected sample. Amounts are calculated using a previously
established calibration table. The use of an external standard requires that the
injected volume of the calibration mixture be known.
ISTD produces a report of the actual amount of each substance. Amounts are
calculated using a previously established calibration curve. The use of an
internal standard in both the sample and the calibration mixture eliminates
the need to know and control the volume of the sample injected. This also
corrects for any variation in instrument performance between runs.