Walk-in fume hood

Unless solvent recycling can be employed, which is not always possible, the operation of large diameter columns inevitably involves the use of large quantities of solvent. It follows that there is a possibility of both fire and toxicity hazards. The solvent should be selected with care and if possible the entire chromatograph, including the solvent supply, electrically grounded, and the apparatus including fraction reservoirs should be located in a walk-in fume hood. 

To investigate the spinning process of PPO hollow fibres it was necessary to first build hollow fibre spinning apparatus designed for use in a walk-in fume hood, because of the hazardous solvents involved in the process. The hollow fibres were produced by the dry-wet spinning method from polymer solutions of PPO in trichloroethylene using the non-solvent methanol as the bore liquid and for the gelation bath. 

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