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Chemstation calibration update and reprocess.
Posted: Thu Nov 29, 2012 2:50 pm
by BCBC
Sometimes when I analyze a calibrator, update calibration and reprocess I get quantitation value that does not agree with my quant. table value. I may have 15.00 ng/ml in the quant. table but get 14.99 or 14.98 after updating calibration and running the method to reprocess. This is using Chemstation. Ver. D.02 or D.01. Drug mode. Any thoughts?
Re: Chemstation calibration update and reprocess.
Posted: Thu Nov 29, 2012 7:22 pm
by Yama001
Sometimes the update in retention times results in the software extracting a portion of the ion chromatogram over a slightly different time range. This can cause a minor change in baseline, peak slope detection, etc.
Note this only applies for a single point calibration; if you can get exact values returned from a multiple level calibration I am impressed.
Re: Chemstation calibration update and reprocess.
Posted: Tue Dec 04, 2012 3:27 pm
by BCBC
Thank you.