PDA detector features

The detector operates as an integral part of a Waters chromatography system.

The Alliance iS photodiode array (PDA) detector is an optical detector capable of simultaneous 2D and 3D operation. The detector is controlled by Empower and offers an analytical flow cell with a volume of 8.4 µL and a path length of 10 mm.

The flow cell design reflects Waters TaperSlit technology.

The detector features:

• Improved equilibration and warm-up time
• Enhanced sensitivity using the patented TaperSlit flow cell, which channels light through the cell for better energy throughput
• Actuator-controlled variable slit
• Lamp, flow cell, and optical filter ID
• Cuvette options
• Precision grating alignment
• Thermal isolation and control
• Home position confirmation
• Lamp optimization for the best performance over the lifetime of a deuterium lamp
• Low baseline noise performance (<10 μAU)
• Enhanced and new functionality to mitigate the effects of changes in ambient temperature (see the following capabilities table)
• Flexible sampling rates from 1 to 160 Hz for normal and fast LC separations
• Independent optimization of sampling rates and filter time constants gives you the ability to tune your detector to your separation goals

Contents

• PDA detector optics
  
• PDA detector wavelength verification and test
  
• Cuvette operations
  
• PDA detector thermal wander management and active thermal control
  
• Variable slit width
  
• Verifying the PDA detector's calibration
  
• Calibrating the PDA detector
  
• Testing the PDA detector for noise and drift
  
• 2D and 3D acquisition