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A24633  
#1 Posted : Friday, May 17, 2019 11:06:59 AM(UTC)
A24633
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Hi all,

My QA report is showing a list of OriginalChemNames with Unit Conversion Problems. This is fine, however, many of the OriginalChemNames are reported from the lab in the same unit we output data (ug/L). I am having trouble understanding why they are reported as having Unit Conversion Problems?  

Thanks,

Alastair.

NickT  
#2 Posted : Friday, May 17, 2019 11:26:39 AM(UTC)
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Hi Alastair,

Are you able to include a screen capture of the unit conversion sheet showing the issues?

This will help us get a better picture of what you mean.

Thanks,

Nick

A24633  
#3 Posted : Friday, May 17, 2019 12:57:20 PM(UTC)
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NickT  
#4 Posted : Friday, May 17, 2019 1:51:49 PM(UTC)
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Hi Alastair,

Thanks for posting that.

Given that the error is related to trying to convert between % and mg/L, it is most likely due to lab QC samples.  For example matrix spike samples will report the resultant recovery as a %, even though the primary results are mg/L.

Assuming that your actual chemistry tables are being presented correctly, I don't think it's anything to concern yourself with.

If you want to find the particular results that are causing the issue, you can use the ChemQA2_Chemistry_Results_with_Raw_Results view and filter to those ChemNames to see which ones have a unit of %.

Cheers,

Nick

A24633  
#5 Posted : Friday, May 31, 2019 11:19:47 AM(UTC)
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Thanks kindly for your help Nick.

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