Fluoropolymer flow cell

In addition, we have begun more rigorous testing of the OSC sensors using the vacuum-driven pull method. A preliminary experiment is described here. A gas-tight fluoropolymer flow cell was constructed with approximately 300 ml internal volume as shown in Fig. 7.10. Tedlar gas sample bags were used to prepare vapor concentrations of interest and the air/vapor mixtures were... 

Very saline samples and/or the addition of organic solvents to the samples were used in early applications in order to provide high refractive indices [88], but the applicability of the LCW flow cell was limited because, in general, only dilute aqueous samples with low refractive indices have been analysed. The development of different kinds of amorphous fluoropolymers (Teflon AFs) with refractive indices lower than that of pure water enabled the design and overall acceptance of flow cells relying on LCWs [89,90]. 

Continuous mns were carried out in a stirred cell ultrafiltration module using the fluoropolymer membrane FS61PP with a nominal molecular weight cut-off of 20kDa. The reactor, loaded with an appropriate amount of resting cells, was fed with a buffered substrate solution by a peristaltic pump with the flow rate set at... 

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