HPLC detector

[pjalindar]

Dear
Why we are using PDA for analytical development?

[bingyechumen]

well, it's very important for us to decide the determine wavelength.Because by uv we can't see all constituents, such as related substances. By PDA we can choose a better wavelength which can determine all constituents. I think PDA is helpful for you to develope an method.

[rwang]

In addition to what bingyechumen has said, you can also extract spectra from peaks in your chromatogram. Often in method development we will see peaks co-elute, and PDA will help us in "telling" the purity of the peak (given that the spetra for co-eluting analytes are sufficiently different).