Requirements of a good detector for liquid chromatographic:

Liquid chromatography scores over gas chromatography because the later is not applicable in cases of compounds which are thermally unstable or not easy to volatilize. In the case of GC, the quantitative recovery of the components is not easily achieved while in LC it is easy to recover the samples quantitatively.

A good detector should have high sensitivity, good precision and predictable responsible to all solutes. It should be unaffected through temperature changes and solvent flow. That should not contribute to extra band broadening. It should be non-destructive to the solute.