What parts are needed to convert the E4 system to high chemical resistance? 

  • (QCS033) High Resistance Sealing Kit E4, 4 Kalrez O-rings, 4 Kalrez gaskets, 4 GORE® Style 100CR tubing for IPN-N4, 4 Perifits.

Is it possible to run my experiments in toluene or similar harsh solvents?

Yes, then you need to use the GORE® tubing:

  • QCS 032 Pump Tubing GORE® Style 100CR highly resistant for IPC N4 (1 pc)
    Note: should be used together with perifit QCS 035
  • QCS 035 Perifit PEEK for QCS 032 Pump Tubing GORE® Style 100 CR, (1 pc)

Or you can buy a high resistance kit containing both O-rings, sealing gaskets and two pieces of GORE® tubing:

  • QCS 033 High Resistance Sealing Kit E4,  (4 Kalrez® O-rings, 4 Kalrez® gaskets, 4 GORE® Style 100 CR tubing for IPC-N4, 4 Perifits)

If I want to run my experiments with ethanol, what should I keep in mind?

For measurements in ethanol we recommend that you use Kalrez O-rings and sealing gaskets as the standard Viton material might swell:

  • QCS 017 O-rings for QFM 401, Highly Resistant (Kalrez® 11.1×1.6 mm, 4 pcs)
  • QCS 018 Sealing for QFM 401, Highly Resistant (Kalrez®, 4 pcs)

The pump tubing needs to be exchanged as well. For ethanol, the MHSL Tygon tubing is suitable:

  • QCS 031 Pump Tubing Tygon MHSL (e.g. ethanol resistant) for Ismatec IPC-N4 (6 pcs)

What is the volume of the open module? 

The maximum volume (of the outer Teflon® container) is roughly 2.5 mL. However, we do not recommend that you use the open module with larger volumes than 400 mL. The smallest volume (depending on the viscosity of the bulk liquid) is 30–50 mL.


Is it possible to store the reference electrode, QSP 020, for the electrochemistry module in ethanol or distilled water?

 The Dri-Ref-2SH should not be stored in either of the fluids, because they will damage the electrode. It should only be stored in 3 M KCL solution. This is the same solution that is used to fill the electrode, and as such it provides an isotonic environment for the electrode, which keeps the porous membrane properly conditioned.

The electrode was designed for use in physiological solutions. It is not known how well the electrode functions as a reference in an ethanol environment.


What are the materials and chemical compatibilities of the tubing ferrules and nuts? 

The ferrules are made of chlorotrifluoroethylene (CTFE), which is very resistant to most chemicals, except THF and some halogenated solvents. It is resistant to all inorganic corrosive liquids (acids included) but swells in ketones.

The nuts are made of polyphenylene sulphide (PPS), which is very resistant to all solvents, acids and bases.