What is difference?

Discussions about gel permeation chromatography / gel filtration chromatography / size exclusion chromatography

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Could someone please tell me what is difference between DAD and PDA detectors? With one is better?
Two different terms for the same type of detector. DAD (Diode Array Detector) tends to be Agilent-speak. PDA (PhotoDiode Array) is what most other vendors call it.

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