HP Data Explorer 4 Series Manuel d'utilisateur télécharger pdf (Page 201)

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101

Adjusting the Baseline

Data Explorer

™

Software User’s Guide 4-29

4.7.2 Using Baseline Correction

Description 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.

When to use 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.

Correcting the

baseline

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.

Returning to the

original trace

To return to the original trace, see “Returning to the original

trace” on page 4-4.

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HP Data Explorer 4 Series Manuel d'utilisateur Page 201

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