| V Colloquium Chemiometricum Mediterraneum Ustica (PA), Sicily, Italy, Europe 25-27 June 2003 |
Dr. Giovanni Visco from Prof. L. Campanella Research Group |
Italy, Rome University La Sapienza Chemistry Department |
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The tridistilled water used to wash the bottles, the filters, the electrodes, the Niskin was produced by a Buchi Fontavapor 285 distiller opportunely modified by us.
The device has been modified separating the cooling circuit, now fed with city water; in such way the distillation circuit is supplied only with the departmental distilled water. A tridistiller, all in Pyrex glass, with no contact between the ultrapure and cooling water is obtained.
Water was then filtered on a sandwich of 0.47 and 0.2 micron filters, the head space wasted, and other stored in new polyethylene bottles previously washed three times.
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