Peak Detection

 

Table 3-1 Chromatogram Settings (Continued)

 

 

 

 

 

 

Parameter

 

Description

 

 

 

 

 

 

Filter Width

Hint: Set Filter Width to a number equal to the number of

 

 

(continued)

points across the peak. To determine the number of points

 

 

across a peak, you can change the trace display from Line to

 

 

 

 

 

 

Vertical Bars. Each vertical bar represents one data point.

 

 

 

For more information, see Section 1.4, Customizing the Data

 

 

 

Explorer Window.

 

 

 

 

 

 

Integration Baseline Settings

 

 

NOTE: You can set peak labels to display peak start, peak end, and baseline marks.

 

 

See Section 3.5.2, Setting Chromatogram and Spectrum Peak Labels.

 

 

 

 

 

 

 

Valley-to-Baseline

Drops a vertical line from all valleys to a horizontal baseline.

 

 

 

The level of the horizontal baseline is determined using the

 

 

 

minimum peak valley point (left or right) for each peak. See

 

3

 

Figure 3-25 on page 3-70.

 

 

 

 

 

 

 

 

Valley-to-Valley

Forces a baseline through all valley points. See Figure 3-25

 

 

 

on page 3-70.

 

 

 

 

 

 

 

Trace Settings

 

 

 

 

 

 

 

 

 

 

 

 

Use same settings

Applies settings to all traces in the active window.

 

 

for all traces in view

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NOTE: In previous versions of Data Explorer software,

 

 

 

peak detection allowed you to specify Peak Width and

 

 

 

Noise Threshold for chromatogram data. The software now

 

 

 

automatically:

 

 

 

Uses a minimum peak width that is equal to the Filter Width,

 

 

 

and a maximum peak width of 10,000 data points.

 

 

 

Calculates the Noise Threshold by performing an automatic

 

 

 

signal-to-noise calculation on a chromatogram and by using

 

 

 

75 percent of the noise value determined as the threshold.

 

 

 

 

 

 

Data Explorer™ Software User’s Guide

3-21