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Calculate signal-to-noise ratio using a blank from a sample set other than the one that has the samples of interest - WKB232412

Article number: 232412

OBJECTIVE or GOAL

Calculate signal-to-noise ratio using a blank from a sample set other than the one that has the samples of interest.

ENVIRONMENT

  • Empower
  • Empower Tip of the Week #275

PROCEDURE

STEP 1
From the Sample Sets tab, highlight the sample sets that contain the data you want to work with. Right-click and select "View As, Channels" (Figure 1).
Figure_1.png

STEP 2
On the Channels tab, have a View Filter already created that includes Sample Set Name. Highlight the Blank from one sample set and Channels of interest from the other sample set. Then create a Process Only Sample Set (Figure 2). Note: Refer to Tip #237 to learn how to create Process Only Sample Sets.
Figure_2.png

STEP 3
Ensure that the processing method has "Calculate USP, EP and JP s/n" selected, along with "Use noise centered on peak region in blank injection" (Figure 3). 
Figure_3.png
STEP 4
When the data is processed, you will see the Blank (Figure 4).
Figure_4.png

STEP 5
The peaks in the sample have both the "USP signal to noise (s/n)" and "USP noise" calculated for each peak and can be displayed in the Peaks table (Figure 5).
Figure_5.png
 

ADDITIONAL INFORMATION

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

EMP2LIC, EMP2OPT, EMP2SW, EMP3GC, EMP3LIC, EMP3OPT, EMP3SW, EMPGC, EMPGPC, EMPLIC, EMPOWER2, EMPOWER3, EMPSW, SUP

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