Commission Regulation (EC) No 606/2009 of 10 July 2009 laying down certain detailed rules for implementing Council Regulation (EC) No 479/2008 as regards the categories of grapevine products, oenological practices and the applicable restrictions (repealed)
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2.MEMBRANE UTILISATION REQUIREMENTS
The membrane pair is formulated so that the following conditions are met:
the pH reduction of the wine is to be no more than 0,3 pH units,
the volatile acidity reduction is to be less than 0,12 g/l (2 meq expressed as acetic acid),
treatment must not affect the non-ionic constituents of the wine, in particular polyphenols and polysaccharides,
diffusion of small molecules such as ethanol is to be reduced and must not cause a reduction in alcoholic strength of more than 0,1 % vol.,
the membranes must be conserved and cleaned by approved methods with substances authorised for use in the preparation of foodstuffs,
the membranes are marked so that alternation in the stack can be checked,
the equipment is to be run using a command and control mechanism that will take account of the particular instability of each wine so as to eliminate only the supersaturation of potassium hydrogen tartrate and calcium salts,
the treatment is to be carried out under the responsibility of an oenologist or qualified technician.
The treatment is to be recorded in the register referred to in Article 112(2) of Regulation (EC) No 479/2008.
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