The refurbished Waters Alliance 2690 and 2695 HPLC systems are equipped with the Waters 2996 PDA detector. Other Waters HPLC detectors are also available. These include the Waters 996 Photodiode Array Detector, the Waters 2996 PDA Detector, the Waters 2998 PDA Detector, the Waters 2487 Dual Wavelength Detector, the Waters 474 Fluorescence Detector, the Waters 2475 Fluorescence Detector, the Waters 410 Refractive Index Detector. detector, the Waters 2410 RID and the Waters 2414 RID. Technical specifications: . - Solvent conditioning: vacuum degassing, two operating modes, four chambers, <500 µL internal chamber. - Programmable flow rate range: 0.000 and 0.010 to 10.000 mL/min in 0.001 mL/min increments. - Effective systemic delay volume: <650 µL, independent of back pressure at 1 mL/min. - Piston seal washing: Integrated, active, programmable. - Gradient profiles: 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 fluctuation: <2.5% (1 mL/min, degassed methanol, at 1700 psi back pressure). - Composition range: 0.0 to 100.0% in 0.1% increments. - Composition accuracy: ±0.5% absolute, independent of back pressure (proportional valve pair test [degassed methanol: methanol/propylparaben, 2 mL/min, 254 nm]). - Composition Accuracy: 0.15% RSD or 0.02 Min SD, whichever is greater, based on residence time (degassed methanol:water, 60:40 Dial-a-Mix, 1 mL/min, 6 repeats, Phenon mix, 254 nm). - Flow accuracy: ± 1% or 10 µL/min, whichever is greater, (0.200 – 5,000 mL/min), (degassed methanol, at 600 psi back pressure). Trial administration:. - Number of sample vessels: 120 vessels, arranged in 5 carousels with 24 vessels 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, Phenon Mix, 254 nm). - Sample transfer: < 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 features: Statistical runs, auto additions, auto standards. - Injection volume range: 0.1 to 100 µL standard; 0.1 to 2000 µL, with optional sample circuit. - Injector linearity: > 0.999 coefficient of deviation (1 to 100 µL) Labprocure is responsible for this device.