Independent analytical testing. Results apply only to the sample received, for research use only.

Canada Peptide Testing
Request testing

Co-elution

Seen on limitation statements.

Definition

Two or more components leaving the column at the same time and integrating as a single peak. Co-elution is the structural reason a visually clean chromatogram is a statement about the method as much as about the sample.

A single sharp peak is not proof of a single compound. It is proof that this method did not separate whatever is in there.

Related terms

Resolution
A numerical measure of how completely two adjacent peaks are separated, combining their spacing and their widths.
Orthogonal method
A second method that separates or detects on a different physical principle from the first, so that what the first method could not distinguish, the second can.

About chromatography

Separation, detection, and the figures that come out of a chromatographic run.

Reversed-phase chromatographyGradientRetention timeArea purityIntegrationBaselineTailing factorTheoretical platesDetection wavelengthChromophoreIon pairingSignal-to-noise ratio

Read more