HP Data Explorer 4 4.7.2 Using Baseline Correction, Description, When to use, Correcting the baseline, Returning to the original trace

Adjusting the Baseline

4.7.2 Using Baseline Correction

Description

When to use

Correcting the baseline

Returning to the original trace

The Baseline Correction feature is a function that corrects for a curved baseline, including a DC-offset baseline, by eliminating broad artifacts from the data set.

Baseline-correct if you are analyzing data:

•With a baseline that is not flat, and you are using the %Base Peak Intensity parameter (intensity-based thresholding) to screen out noise peaks. For best results, apply Baseline Correction, then re-detect peaks.

If you use area-based thresholding (%Max Peak Area) during peak detection, Baseline Correction is not typically needed. %Max Peak Area compensates for a rising or falling baseline.

•With a baseline that is not at 0, to improve peak detection of small peaks.

To correct the baseline:

1.Display the spectrum of interest.

2.From the Process menu, select Baseline Correction.

The baseline is adjusted, and the trace is displayed with a BC trace label.

To return to the original trace, see “Returning to the original	4
trace” on page 4-4.

Data Explorer™ Software User’s Guide 4-29