Tip #206: Empower User Question: Filtering the Control Chart for certain components

Welcome back to Get Empowered! In the last Empower tip-of-the-week blog for Empower Chromatography Data System, we learned how to add a Purity Plot to a Report Method (Tip #205).

In this week’s tip, we will answer another Empower user question regarding reports, filtering Control Charts.

Q: How do I filter the control chart for certain components?

Great question. Let’s get started.

(Please Note: Refer to Tip #73 to learn how to create a Control Chart.)

Step 1

In this chromatogram, you have three peaks, two of which have a lower limit set for the USP Plate Count (figure 1).

Figure 1

Step 2

The Report Method displays a Control Chart for each peak. The Uracil Peak is a ‘void volume marker’ and we want to filter that peak out of the report (figure 2).

Figure 2

Step 3

There is no Peak level filtering available in the Summary Plot, however, there is a work around. If you create a composite group which includes the Summary Plot, you will have peak level filtering. Expand ‘Drawing Objects’ and then expand ‘Rectangles’. Double click the white rectangle to add it under the ‘Summary Plot’ (figure 3).

Figure 3

Step 4

Control click both groups and from the ‘Edit’ menu, select ‘Group’ (figure 4).

Figure 4

Step 5

Right click on the composite group and select ‘Composite Properties’ (alternatively you can select Composite Properties from the Edit menu) (figure 5).

Figure 5

Step 6

On the ‘Order By’ tab, click ‘Data Filtering Conditions’ (figure 6).

Figure 6

Step 7

Expand Peak and double click on ‘Name’ (figure 7).

Figure 7

Step 8

Click in the ‘Condition 1’ field which opens the ‘Create a Condition’ dialogue. Select ‘Not Equals’, type the name of the peak in the field to the right and click ‘OK’ (figure 8).

Figure 8

Step 9

The Data Filter Conditions is set to filter out the peak with the name ‘Uracil’ (figure 9).

Figure 9

Step 10

Click ‘OK’ to the Data Filter Conditions and the Composite Properties. In Preview, you see the Uracil peak has been filtered out of the report and the white rectangle is invisible (figure 10).

Figure 10

It’s that easy!

Final Note: You can use either the Pro or QuickStart interface for this tip.

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Next week in Empower Tip #207 – We will discuss sampling rate and time constant.

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