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Waters Alliance 2790 HPLC system with Waters 996 PDA Detector

Waters Alliance 2790 HPLC system with Waters 996 PDA Detector
  This refurbished Waters Alliance 2790 HPLC system comes with Waters 996 PDA Detector.

We have other Waters HPLC detectors as option.

    * Waters 486 Tunable Detector
    * Waters 2487 Dual wavelength Detector
    * Waters 474 Scaning Flurecense Detector
    * Waters 2996 PDA Detector

Solvent Management


Number of Solvents:

One to four, three with vacuum degas

Solvent Conditioning

Vacuum degas, three solvents plus purge solvent

Typical Operating Flow Rate Range

0.050 to 5.000 mL/min in 0.001-mL/min increments

Programmable Flow Rate Range

0.000 and 0.010 to 10.000 mL/min in 0.001-mL/min increments

Compressibility Compensation

Automatic and continuous

System Delay Volume

<400 µL, independent of backpressure, 1 mL/min

Plunger Seal Wash

Integral, active, programmable


Gradient Profiles



Eleven (11) gradient curves [including linear, step (2 curves), concave (4 curves), and convex (4 curves)]

Dry Prime/Wet Prime

Automatic, front panel control

Flow Ramping

Time (0.01 to 30.00 min in 0.01-min increments) to reach maximum flow rate) to reach maximum flow rate

Maximum Operating Pressure Maximum Operating Pressure:

5000 psi (345 bar) at 0.010 to 3.000 mL/min; Programmable upper and lower limits

Composition Range: 

0.0 to 100.0% in 0.1% increments

Composition Accuracy

±0.5% absolute, independent of backpressure] (Proportioning Valve Pair Test [degassed methanol: methanol/propylparaben, 2 mL/min, 257 nm])


A Composition Precision

<=0.15% RSD or<=0.02 min SD, whichever is greater, based on retention time. (Degassed 60% methanol:40% water Dial-a-Mix, 1 mL/min, six replicates, phenone mix, 257 nm)

Flow Precision

<=0.075% RSD or <=0.02 min SD, whichever is greater, based on retention time (N = 6) or volumetric measures (0.200 to 5.000 mL/min), isocratic premix


Flow Accuracy

<=1% or 10 µL/min, whichever is greater, (0.200 to 5.000 mL/ min), degassed methanol, at 600 psi backpressure

Sample Management


Number of Sample Plates

Total of four plates: 
- Microtiter plate – 96- or 384-well 
- Vial plate – 2.0-mL vial (48) 
- Tube plate – 0.5-mL micro-centrifuge tube (48) or 1.5-mL micro-centrifuge tube (24) 
- Open access plate – 2.0-mL vial (24 or 48)

Sample Temperature Control

4 to 40° C, programmable in 1° C increments

Maximum Sample Capacity

1536 in four 384-well plates

Number of Sample Injections

1 to 99 injections per sample

Sample Delivery Precision

<0.3% RSD, full loop 50 µL. (Default wash/purge conditions, degassed 60% methanol: 40% water Dial-a-Mix, 1 mL/min, six replicates, paraben mix, 257 nm)

Sample Volume Linearity

>0.999% correlation, 5 to 20 µL, partial fill in 50-µL loop, 3-µL pre- and post-sample air gaps (Default wash/purge conditions, degassed 60% methanol:40% water Dial-a-Mix, 1 mL/min, six replicates, paraben mix, 257 nm)

Needle Wash Solvents

Two: wash (strong solvent) and purge (sample- compatible) solvent A

Sample Carryover

<0.01% or <2.5 nL (default wash/purge volumes), whichever is greater. (Blank injection, 25 µL, 60% methanol:40% water, after six replicates, 25 µL propylparaben, 1 g/L, 257 nm)

Water 996 PDA detector




11.5 x 22 inches (29x56 cm)


31 lbs (14.3 kg)

Wavelength range

190 to 800 nm

Wavelength accuracy

+1 nm

Linearity range

5% at 2.0 AU, propylparaben, at 258

Spectral resolution

1.2 nm

Baseline noise

+1.5 x 10-5 AU peak-to-peak, dry, at 254 nm


1 x 10-3 AU/hour at 254 nm (after warm-up)

Flow cells Standard Semi-preparative microbore inert

Pathlength (mm):                            Tubing (I.D.)
                10                                           0.009 in
                3                                              0.040 in
                3                                              0.005 in
                10                                           0.010 in


This refurbished Waters Alliance 2790 HPLC system is in great condition. It has been tested at SpectraLab Scientific.
We could sell them separately upon request.
A 90 day warranty is included.
We are seasoned professionals in this area and we would be happy to have you speak with one of our experts here at SpectraLab.
Thanks for looking and we look forward to hearing from you!
Multiple available

  Price: In Stock Call for Quote
  We will match prices with our competitors
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1-866-777-3688 Tel: 905-946-8066
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