Machine-translated by Google. Questions are authored in English.
Top

Discussion

What is matrix effect in a chromatographic determination?

  • A.The column retaining the matrix irreversibly
  • B.The matrix absorbing at the analytical wavelength
  • C.The sample's viscosity changing the injected volume
  • D.Co-extracted material altering the analyte's response

Answer: D

Components extracted alongside the analyte can suppress or enhance its detector response, particularly in electrospray, so a calibration in clean solvent no longer applies. Irreversible retention, absorbance and viscosity are separate problems that also exist. Because the effect varies between samples of different origin, it is measured with a post-extraction spike rather than assumed negligible.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.