Dionex Corporation - P680A LPG Quaternary Gradient Pump

Achieve higher productivity using the P680A LPG Low-Pressure Gradient Pump. Its flexible eluent proportioning (four eluents) and synchronization with injection optimizes all routine and method development applications. Get faster results from your HPLC system with the P680A LPG minimal delay volume of less than 400 µL—independent of system backpressure. The built-in vacuum degasser, a costly option in other manufacturers’ pumps, is standard in the LPG version.

Higher Productivity The P680A LPG helps you achieve higher productivity in method development applications due to the flexibility of up to four eluents. With programmable rinse cycles, the pump can wash out buffers automatically before shutting down the system, thus preventing blockages of capillaries and tubing. The standard built-in vacuum degasser, a costly option in other manufacturers’ pumps, ensures smooth baselines and trouble-free flow.

Accurate and Precise Gradients The best way to test the ability of a pump to perform accurate and precise gradients is to run a gradient profile with very small gradient steps. With the P680, the 1% steps are clearly defined, accurate, and reproducible; the maximum step deviation is less than 0.5%. The reproducibility is better than 0.2% SD for all steps. This incredible performance is achieved using SmartFlow TM  technology and the high precision of the pump's proportioning valve.

Faster Results with Minimal Delay Volume Because the P680 pump eliminates pulsation at its source, additional pulse dampening devices are not required. Thus, the gradient delay volume, even for the low-pressure gradient configuration, is less than 400 µL, including the integral dynamic mixing chamber. Unlike pulse damper equipped systems, the delay volume—and therefore the retention time reproducibility in gradient applications—is totally independent of the system pressure. Minimal gradient delay volume and the small-volume dynamic mixer make even fast gradients highly reproducible.

Reliable Results The synchronization of the ASI-100 TM   Autosampler injection with the P680A LPG pump, pushes the retention time reproducibility to new limits. The synchronization is typically used with gradient applications. The autosampler and pump communicate with each other to ensure reliable results for your most demanding analysis.