Empower Tip #259 | Peak Purity (Part 9)

By January 5, 2022

Tip #259: Reporting Peak Purity Results

Welcome back! In this week’s tip for Empower Chromatography Data System (CDS), we continue our series on Peak Purity using both the PDA detector and QDa Mass detector and discuss reporting Peak Purity results. (In last week’s tip, we discussed Multi Component Peak Purity, Tip #258).

Reporting of numerical and/or graphical results for Peak Purity is straight forward. We will focus on reporting only Peak Purity results. If you want to learn more about creating/working with Report Methods, refer to the Empower Tip series on Creating Report Methods (Tips #148 > #164)

Let’s get started.

Step 1

If you are new to creating Report Methods, I recommend copying the default Report Methods from the PDA Defaults project into your working project. Highlight the Report Methods from PDA Defaults, right click and select ‘Copy to Project’. Select your project, click ‘OK’ (figure 1).

figure 1

Step 2

One of those Report Methods, the PDA Purity Plot report, displays one Purity Plot for each peak. The Purity Angle and Purity Threshold will be displayed below each plot (figure 2).

figure 2

Step 3

Add Peak Purity results from the QDa Mass detector to our report by adding the Mass Analysis Plot to the report (figure 3).

figure 3


Step 4

In the properties of the Mass Analysis Plot, select ‘Purity’ on the Mass Analysis tab. You can limit the number of peaks plotted per page to make it easier to see the Purity View (figure 4).

figure 4

Step 5

Just as in Review, you can see the UV and MS spectra from the leading edge, apex, and trailing edge for each peak (figure 5).

figure 5

Step 6

If you do Multi Component Peak Purity as described in Tip #258, the ‘4 Pass Peak Purity Report’ (also found in the PDA Defaults project) will display a purity plot for each Purity Pass for every peak (figure 6).

figure 6

Step 7

The plots described above can be found under PDA/MS Groups in the Report Publisher (figure 7).

figure 7

Step 8

Purity Angles and Purity Thresholds can be added to any existing report table by looking under PDA Peak (figure 8).

figure 8

It’s that easy!


Final Note: This can be done with either the Pro or QuickStart interface.

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Next time in Empower Tip #260– we will answer an Empower user question about working with QDa data.

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Categories: Empower Tips