沃特世仪器说明书Plunger Seal Wash.pdf

® ® Waters Alliance HPLC Systems: Guidelines for Ensuring Optimum Performance Plunger Seal Wash All 2695 and 2795 Separations Modules are supplied with programmable, continuous active plunger seal wash (see table). Plunger Seal Wash Kit Description Part Number Included in Application (2 per package) Performance Maintenance Kit Plunger Seal Wash WAT271018 Yes General Kit Seal wash solvent lubricates the plungers and flushes away any solvent or dried salts forced past the plunger seal from the high-pressure side of the piston chamber. This wash cycle extends the life of the seals. To keep the plunger seal wash operating effectively, position the plunger seal-wash reservoir in a visible location above the solvent management system, and refill the reservoir as necessary with a solvent that is suited to your application: • For reversed-phase HPLC applications, use an aqueous plunger seal-wash solution with enough organic content to inhibit bacterial growth. For example, use 80% water with 20% methanol or acetonitrile, depending on your application. • For all GPC (normal phase) separations, use a 50/50 mix of methanol and water for your seal-wash solution. NOTE: You must use separate solutions and containers for the plunger-seal wash and sample management system needle wash. Because the functions of these solutions differ, the use of one solution for both functions may compromise the effectiveness of either needle washing or plunger-seal washing. Change the plunger seal-wash seals whenever you change the main plunger seals.