PDA Principle and application

PDA stands for Photodiode Array Detector


Obtain the the spectra profiles form molecular mixtures or chromatographically separated samples 

Benefits: Ultra-fast, low noise spectral analysis 


 Resolution determined by the number of diodes deployed over a specific wavelength range. An HPLC photo diode array detector is coupled to eluates of separation devices by molecular weight, hydrophobicity (reverse-phase) or ionic charge, making them important for HPLC. Certain HPLC PDA detectors handle the entire spectrum from the UV at 190nm to the Near IR at 1 micron, whereas others are specifically targeted to the UV, visual or near IR, with up to 2048 elements provided for ultimate flexibility in resolution and multiplexing. These machines provide high sampling speeds of up to 190 Hz and provide thermo electric (Peletier) temperature control of sensors to limit noise. HPLC photo diode array detector detectors offer programmability for processing spectra, utilizing spectral libraries for component identification and multiple spectral displays.
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