| Solvent Conditioning | Vacuum degas,two (2) operating modes, four (4) chambers, < 500 µL internal volume per chamber |
| Programmable Flow Rate Range | 0.000 and 0.010 to 10.000 mL/min. in 0.001 mL/min. increments |
| Effective System Delay Volume | < 650 µL , independent of backpressure @ 1 mL/min. |
| Plunger Seal Wash | Integral, active, programmable |
| Gradient Profiles | Eleven (11) gradient curves (including linear, step [2], concave [4], and convex [4]) |
| Maximum Operating Pressure | 5000 psi. (345 bar) (0.010 – 3.000 mL/min) Programmable upper and lower limits |
| Pressure Ripple | <2.5% (1 mL/min., degassed methanol, at 1700 psi backpressure) |
| Composition Range | 0.0 to 100.0%, in 0.1% increments |
| Composition Accuracy | ±0.5% absolute, independent of backpressure (Proportioning Valve PairTest, [degassed methanol: methanol/propylparaben, 2 mL/min., 254 nm]) |
| Composition Precision | 0.15%RSD or 0.02 min. SD, whichever is greater, based on retention time.(Degassed methanol:water, 60:40 dial-a-mix, 1 mL/min., 6 replicates,phenone mix, 254 nm) |
| Flow Precision | 0.075%RSDor 0.02 min. SD, 6 replicates, based on retention time or volumetricmeasures (0.200 – 5.000 mL/min.), isocratic premix |
| Flow Accuracy | ± 1% or 10 µL/min. whichever is greater, (0.200 – 5.000 mL/min.), (Degassed methanol, at 600 psi backpressure) |
Sample Management
| Number of Sample Vials | 120 vials, configured in 5 carouselsof 24 vials each |
| Number of Sample Injections | 1 to 99 injections per sample vial |
| Sample Delivery Precision | Typically < 0.5% RSD, 5 – 80 µL (Degassed methanol: water, 60:40 dial-a-mix, 1 mL/min., 6 replicates, phenone mix, 254 nm) |
| Sample Carryover | < 0.1% |
| Injection Accuracy | ± 1µL (± 2%) (50 µL, N=6), Sample: 100% degassed water, Analytical solvent: 100% degassed methanol |
| Sample Temperature Control | 4 to 40°C, programmable in 1°C increments |
| Advanced Operations | Stat runs, Auto additions, Auto standards |
| Injection Volume Range | 0.1 to 100 µL, standard; 0.1 to 2000 µL, with optional sample loop |
| Injector Linearity | > 0.999 coefficient of deviation (1 to 100 µL) |
Waters 996 PDA detector
| Item | Specification |
| Dimensions | 11.5 x 22 inches (29×56 cm) |
| Weight | 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 |
| Drift | 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 2690/2695 HPLC system comes with Waters 996 PDA. They are in great condition and have been tested at SpectraLab Scientific.
Can be sold separately upon request.
A 90 day warranty is included. Multiple available
