Agilent G1311B 1260 Quaternary Pump

– Hydraulic system: Dual piston in series pump with servo-controlled variable stroke drive, floating pistons.
– Settable flow range: Set points 0.001 – 10 mL/min, in 0.001 mL/min increments.
– Flow range: 0.2 – 10.0 mL/min
– Flow precision: ≤0.07 % RSD or ≤0.02 min SD, whatever is greater; based on retention time at constant room temperature.
– Flow accuracy: ± 1 % or 10 µL/min whatever is greater; pumping degassed H2O at 10 MPa (100 bar).
– Recommended pH range: 1.0 – 12.5, solvents with pH < 2.3 should not contain acids which attack stainless steel.
– Gradient formation: Low pressure quaternary mixing/gradient capability using high-speed proportioning valve.
– Delay volume: 600 – 900 µL, dependent on back pressure; measured with water at 1 mL/min (water/caffeine tracer).
– Composition range: 0 – 95 % or 5 – 100 %, user selectable.
– Composition precision: < 0.2 % RSD or < 0.04 min SD, whatever is greater, at 1 mL/min; based on retention time at constant room temperature.