Technical data

Understanding Your Agilent ChemStation 99

Integration

Baseline Allocation

The valley height ratio takes the same value for both front peak skimming and

tail peak skimming (see "Valley height ratio"); the front skim height ratio is

calculated in the same way as the tail skim height ratio (see "Tail skim height

ratio"), but can have a different value.

Unassigned Peaks

With some baseline constructions, there are small areas that are above the

baseline and below the signal, but are not part of any recognized peaks.

Normally, such areas are neither measured nor reported. If unassigned peaks

is turned on, these areas are measured and reported as unassigned peaks. The

retention/migration time for such an area is the midpoint between the start

and end of the area, as shown in Figure 23 on page 99.

Figure 23 Unassigned Peaks

Peak Separation Codes

In reports, each peak is assigned a two-, three- or four-character code that

describes how the signal baseline was drawn.

Characters 1 and 2

The first character describes the baseline at the start of the peak and the

second character describes the baseline at the end of the peak.

%#)-'

%#*-&

%#-('