hplc > Quaternary Pump

• Agilent 1100 G1311A Quaternary Pump
   
  £3,450
• Waters 616 Quaternary Pump
   
  £3,300
• Lab Alliance Series 2500 Inert Quaternary Pump
  £2,500
• Waters Delta 600 Quaternary Pump
   
  £2,450
• TSP P4000 Quaternary Pump
   
  £1,500

When To Use Quaternary Pumps

A quaternary can mix 4 eluents (hence quat), and can be used when analyzing a complicated mixture, for a 3 component gradient, to include wash solvents or to just have 2 pairs of eluents (so you can pick and choose between 2 or more separations, without changing eluent bottles).

Instead of using four pumps, quats use one dual-piston reciprocating pump and a solenoid controlled portioning valve located in-line between the solvent degasser and the pump head.