Empower custom field - adjusted total area calculations

Discussions about chromatography data systems, LIMS, controllers, computer issues and related topics.

2 posts Page 1 of 1
Hi,

I’m setting up custom fields in empower 3 for an impurities report template. I need to subtract certain known peak areas from the total area for the individual impurity % area/area calculations.

For example, in a sample containing BHT I need to calculate the % area of each impurity against the total area of all peaks in the sample except BHT. At most I would have to subtract two peak areas.

I have tried using CCompref for this:
Adjusted_Total_Area = Total Area-CCompref1[Area]
Adjusted_Percent_Area = (Area/Adjusted_Total_Area)*100

Currently the Adjusted_Total_Area custom field just calculates the total area without subtracting anything. Also, I assume doing it this way would mean I'd have to label every impurity peak and assign CComprefs individually to each in the processing method?

Does anyone know a way of making this work, either in a similar way or completely differently?

Thanks for any help
Name and exclude the unwanted peaks. By naming them sys_1, sys_2 etc. you can get them all with a sys_* exclusion.
Thanks,
DR
Image
2 posts Page 1 of 1

Who is online

In total there is 1 user online :: 0 registered, 0 hidden and 1 guest (based on users active over the past 5 minutes)
Most users ever online was 1117 on Mon Jan 31, 2022 2:50 pm

Users browsing this forum: No registered users and 1 guest

Latest Blog Posts from Separation Science

Separation Science offers free learning from the experts covering methods, applications, webinars, eSeminars, videos, tutorials for users of liquid chromatography, gas chromatography, mass spectrometry, sample preparation and related analytical techniques.

Subscribe to our eNewsletter with daily, weekly or monthly updates: Food & Beverage, Environmental, (Bio)Pharmaceutical, Bioclinical, Liquid Chromatography, Gas Chromatography and Mass Spectrometry.

Liquid Chromatography

Gas Chromatography

Mass Spectrometry