by What is PDA detector
Photodiode array detectors—variously abbreviated as “PDA detectors” or simply “DADs”—are essentially spectrophotometers that transiently measure the absorbance of light by a liquid flowing past.
PDA detectors used:
PDA detector can collect spectra of each peak and calculate the absorbance maximum.
Detection of multiple wavelengths
PDA detector can monitor a sample at more than one wavelength. This is especially useful when the wavelength maxima of the analytes are different.
PDA detector in HPLC Range:
It uses a 1024 element photometric diode array, with measurement wavelength range from 190nm to 900nm and resolution of 1nm. Fast spectral acquisition rate of up to 100 spectra/sec.
Lamp is used in PDA detector:
Deuterium Lamp (PDA Plus)
Wavelength range of PDA:
Most PDA detectors have a wavelength range of 200-800 nm while the VGA-101 has a range of 125-430 nm
Difference between UV and PDA in HPLC:
Range of UV-VIS (190-800 nm) called a UV/VIS detector.
the PDA detector passes a wide range of light through the sample and after that, the light is isolated into individual wavelengths subsequent to going through the sample.
