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WineEast pH 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4.0 Given Molecular SO2 0.6 ppm 8 10 12 15 19 24 30 38 47 59 74 94 Amount of Free SO2 Level 0.8 ppm 11 13 16 20 26 32 40 50 63 79 99 125 per month, so an occasional sulfur check is important in maintaining adequate free SO2 Without the protection from adequate SO2 , white wines can die early—or worse, suffer from biological spoilage. Bottling precautions Having adequate SO2 during the process. Enough SO2 financial issue. If there is too much SO2 at bottling is a critical , consumers will rightfully reject the wine, or release dates may need to be postponed un- til levels moderate. The bigger danger is in too little SO2 adequate SO2 . Without the protection from in the bottle, white wines can die an early death—or even worse, suffer from biological spoilage. If proper attention is paid to SO2 mainte- nance in the cellar, the pre-bottling adjust- ment will be minimal. Obviously, the mini- . You may also take into account the storage time until bottling and fluff up your addition to compensate for this antici- pated loss. - SIHA YEAST - Aftek_Sept08.qxp 7/31/08 2:48 PM Page mum threshold will be the molecular SO2 you've attempted to maintain throughout storage. But since bottling is a fairly violent process even under the best of conditions, there will always be some oxygen pickup above your target. Testing your free SO2 needs to be present to compensate for this and still leave the wine with a molecular SO2 at or before and a week after bottling can give you a rough estimate of the amount of SO2 that will be consumed during your bottling opera- tion. This information can be used to help determine the proper addition for future bottlings. To get started, an additional 8-10 ppm free SO2 over and above what you need to achieve a specific molecular SO2 is a pretty safe bet. Vance_Jan11.qxp 11/23/10 9:29 AM Page 1 Another consideration is time until release of the wine. If the wine is going to market right away, you really don't want SO2 to be apparent in the nose, and so the Wines & Vines JUne 2011 69 O AK ALTERNATIVES - BECOPAD - DECAN TERILE FILTRATION - WATER FILTRATIO T E R CENTRIFUGES - S N