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Validating the Oxygen Performance of a Wine Closure

Validating the Oxygen Performance of a Wine Closure
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Validating the Oxygen Performance of a Wine Closure - 1

Tim Keller and Annegret Cantu. VinPerfect Inc., 831 Latour Court, Suite B1, Napa, Ca 94558, USA. Email:acantu@vinperfect.com VOUR WINE DESERVES NO LESS

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Validating the Oxygen Performance of a Wine Closure - 2

First grade ‘Flor grade Horizontal storage (months) Oxygen plays a key role in wine chemistry and aging as it affects the stability and sensory properties of wine. Amongst the current choices of wine closures the discussion of oxygen permeability has come to the forefront, but there is little agreement as to what methods are appropriate for measuring oxygen transmission rates (OTR) in a wine context or even what the target OTR should be. Given the high number of reported faults in bottled wines stemming from over, or under oxidation, the ability to measure oxygen transmission through a...

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Validating the Oxygen Performance of a Wine Closure - 3

MATERIALS AND METHODS Material Figure 2. VinPerfect’s shelf life reasoning -‐ years to 5 ppm. How does the winemaker choose an oxygen level within this range? If we consider the light white wine example, which is the most vulnerable to oxidation, a winemaker should probably utilize a closure closer to the low-oxygen end of the range at 0.5 ppm per year. Conversely, a red wine with elevated phenolic content and therefore a higher oxygen absorption capacity could benefit more from an oxygen rate close to 1 ppm per year. A red wine has less to risk from the upper oxygen limit. In the end, the...

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Validating the Oxygen Performance of a Wine Closure - 4

RESULTS OF RESEARCH TO-DATE a. Figure 5. a) MOCON OpTech-O2 Analyzer and b) Calibration Card Figure 7. Comparison Trial OpTech O2 Analyzer versus NOMASense O2 Trace measuring head space (HS) and dissolved oxygen (DO) over time in wine. Calibration is performed with a MOCON OpTech-O2 CalCard (see Figure 2b) Figure 8. Three levels of liners metalization. Comparison of Closure OTR (mg/L/Day) Figure 6. Non-invasive oxygen sensors MOCON OpTech and NOMASense side by side in solution and in the headspace Figure 9. VinPerfect comparison of closure OTR (mg/L/day) and prediction for *New Liner...

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Validating the Oxygen Performance of a Wine Closure - 5

> Both NOMASense and MOCON OpTech oxygen analyzers show almost identical performance in measuring head space and dissolved oxygen and work excellent and a winelike-solution. The MOCON instrument has the advantage of being more cost efficient for sensors and the instrument itself. MOCON OpTech is also more user-friendly, and includes software to record and track data easily. (1) Blanchard et al., 2004. Reactivity of 3- Mercaptohexanol ‐ in Red Wine: Imp of Oxygen, Phenolic Fractions, and Sulfur dioxide. Am. J. Enol. Vitic. 55, 115- 120 ‐ (2) Boulton et al., 1996. Principles and Practices...

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