General Notes; Materials - Mettler Toledo DV1001 Manual De Instrucciones

Interchangeable burettes
4

General notes

Remove air bubbles at the piston surface by taking the burette out of the guide and lightly tapping its
base. This causes the air bubbles to rise to the top. Then flush the burette.
Remove air bubbles in the tubing by tapping the tubing with your fingers while titrant is being siphoned
off or dispensed. If this does not help, undo the suction tubing so that the titrant flows back into the bottle,
screw it on again and rinse the burette (air purging). In obstinate cases undo both tubing, rinse with
deionized H O and ethanol and dry using oil-free compressed air or vacuum.
2
Titrants can easily crystallize in the tip of the burette and block it. This is especially true for non-aqueous
titrants. If you have no immediate use for a titrant, it is best to empty and clean the dispensing tubing:
Unscrew connection to let the titrant flow out. Check the threaded connection and wipe off any drops. If
the tip is blocked, take out the tip from the titration tube and wash both with abundant warm water in
order to dissolve the crystals.
KF titrants evolve gas (SO
well as in the burette (stopcock). For this reason burettes should be rinsed prior to titration!
5

Materials

Glass cylinder
Burette housing
Centering ring (5, 10, 20 mL burette)
Locking screw
Piston rod / head
Light protection tube
Stopcock
Tubing
Cylinder holder (1 mL burette)
O-ring (1 mL burette)
Knurled screw (1 mL burette)
Burette holder
Gasket
Burette tip holder
Stopper
Siphon tip
Drying tube / Drying tube holder
Gas inlet
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) especially at elevated temperatures causing bubbles to form in the tubing as
2
Borosilicate glass
glass-filled PP
PP
PP with glass fiber
Brass, nickel & chrome plated / PTFE
PA
PTFE / Al O or PTFE / PTFE
2 3
FEP; red protective tubing: PVC
PP
EPDM
PP
glass-filled PP
PTFE
PP
PE
PFA
PP (cover: PE) / glass-filled PP
glass-filled PP
METTLER TOLEDO DV1001/1005/1010/1020