Get Empowered: Review Window and the Processing Method | Tip #45
Tip #45: Calculating impurities and creating impurity groups (Part 6)
Welcome back to Get Empowered! In the last tip-of-the-week blog for Empower Software, we discussed how to set thresholds for specified impurities.
- Tip 40: Calculating unnamed impurities in samples (part 1)
- Tip 41: Calculating impurities in samples by % adjusted area (part 2)
- Tip 42: Calculating impurities in samples by % area against the main peak (part 3)
- Tip 43: Calculating impurities in samples and setting thresholds (part 4)
- Tip 44: Calculating impurities and setting thresholds for specified impurities (part 5)
This week we will look at creating impurity groups (part 6).
In the last two examples we learned how to set limits for all impurities as well as specified impurities. It may be necessary to report total impurities as well as group impurities of a similar type together. These tasks are easy to do in Empower Software.
Let’s start by bringing a sample set into Review. Open the Processing Method and click integrate followed by quantitate (Figure 1).
Click the Processing Method tool and then the Impurity tab. If we want to report total impurities found in our sample, check the box marked Calculate Total Impurities (Figure 2).
Return to the main window and click quantitate. Scroll to the bottom of the peaks table and you will see a new line for Total Impurities (Figure 3). The impurity response for the total impurities is the sum of the individual impurity responses for any peak whose response exceeds the reporting threshold. You can also unhide the Number of Peaks in Group field to have the peak count for the group.
Return to the Impurity Tab in the Processing Method. We can set a limit for the total impurities by entering a value in the Total Impurities field (Figure 4).
If we want to create groups of impurities based on a common component type, we can do so very easily. Click on the Component tab and note that we have three impurities that are Low Level Impurities (Figure 5).
Click on the Impurity tab and in the area marked User Defined Impurity Groups, start by entering a name for the group in the Group Name field. In the Component Type field, select the Component Type from the drop down list – in this case Low Level Impurities (Figure 6).
Return to the main window, click quantitate, and scroll to the bottom of the peaks table. You see a new line just above the Total Impurities for the new group (Figure 7). The Impurity Response for the group is the sum of the responses for the three peaks with the component type Low Level Impurity.
It’s that easy!
I learned how to create impurity groups when calculating impurities in Empower! #EmpowerTips Click To Tweet
Final note: This procedure can be followed using the QuickStart or Pro interface.
Please rate this Empower Tip of the Week
Next week in Empower Tip #46: Setting %Liftoff and %Touchdown in the Processing Method
- Want to learn more? Check out our Empower training courses and eLearning
- Get the latest Empower projects, options, and more. Check out the New Marketplace
- See all of our tips for using Empower CDS Software
- Comments? Connect with at #EmpowerTips or @WatersCorp on Twitter.
- Submit an Empower 3 Review with Select Science. Write a review.
Do you want Empower Tips sent to your inbox every week?
Questions? Tips of your own? Let us know!