Empower Tip: Review Window and the Processing Method

In the last tip, we created a Component Custom Field for Label Claim. Our goal in this tip is to calculate the percent of Label Claim for an ingredient in the final product. The calculation is a simple one: take the calculated amount of the ingredient, divided by the label claim, times 100. This can be done by creating a Peak Custom Field. A Peak Custom Field is a user defined calculation pertaining to a peak or peaks within the chromatogram.

Launch the new Custom Field wizard and view the Data and Type Selection screen. Select ‘Peak’ as the field type and ‘Real’ as the data type.

On the Source Selection screen, the data source defaults to ‘Calculated’. (Note: Whenever you select either ‘Peak’ or ‘Result’ as ‘Field Type’, Empower understands that you want to make a calculation).

The Formula Entry screen is divided into three areas:

Field=: an open text box to enter the calculation

Fields: displays a list of fields you can select from for the calculation

Operations: displays the various mathematical operators you can select from

Scroll to the right in the Fields section and locate Amount. Double click on ‘Amount’ to add it to the Field area. The division symbol is the / (forward slash). Double click on the / to add it to the Field area.

Scroll to the right in the Fields section, locate Label_Claim. Double click on ‘Label_Claim’ to add it to the Field area. The multiplication symbol is * (asterisk). Double click the * from the Operations section to add that to the Field area and then enter ‘100’.

Once we process the data, we see the result for one of the samples. The new Peak Field will automatically appear in the peaks table in review.

In this sample, the result for the calculation is red because it is outside of a range set in the Limits tab of the Processing Method. Please refer to Tip 27: Using System Suitability to Flag Failing Results to learn how to set up the Processing Method to flag failing results.

It’s that easy!