Malvern MPT-2, User Manual, Page: 76 / 85

Appendix A Appendices
Page A-6 MAN 0318
Chemical compatibility
The sample flow path in the titrator and degasser has been manufactured from
materials that are considered to give the widest protection from chemical attack.
However, it is important to check that any sample or titrant used is chemically
compatible with the materials that they will come into contact with within the
accessory.
The sections below detail all materials that come into contact with the sample and
titrants in the normal operation of the accessory.
MPT-2 Multi-purpose titrator
Vacuum degasser
Titrants and Solvents
Use only HPLC grade solvents in all analyses.
Caution!
The degassing membrane in the Vacuum Degasser is manufactured from
Teflon AF®.
Component Materials
Sample/titrant containers (25ml) Polypropylene
Sample/titrant containers (125ml) Polypropylene
Sample container mount (i.e. dispersion head) Polypropylene
Titrant container mount Polypropylene
Magnetic stirrer 'flea 'Teflon’
Manifold PEEK (Polyetheretherketone)
Manifold valves PEEK and FFKM (seal)
Dispensing syringes PTFE
Peristaltic pump tubing Silicone rubber
Internal Tubing PTFE
Tubing to optical unit and cell Silicone rubber
Tubing connectors Polypropylene / PVDF
pH probe Glass
Displacement ring PEEK (Polyetheretherketone)
MAN0318-4.0 - MPT-2 Autotitrator-Degasser.book Page 6 Tuesday, September 4, 2012 12:15 PM