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News Every Day |

No, putting a spoon in an open bottle of champagne doesn’t keep it bubbly – but there is a better way



At a recent tasting, I was presenting some sparkling wines from the Limoux region of France, a region that produced sparkling wines at least 100 years before wines from the Champagne region were well known.

Towards the end, I commented that if the bottle is not empty, seal it with a sparkling wine stopper and store it in the refrigerator. The response was: “Why bother to seal it? Just put a spoon in the neck.”

I was somewhat surprised. Although I had heard it suggested previously, I did not think anyone took the idea seriously.

The fact is, it’s a myth to say a spoon in an open bottle of sparkling wine keeps it bubbly. You’re better off buying a proper stopper.

A champagne stopper in a bottle.

If you need to store a partly-used bottle, go and buy a proper sparkling wine stopper.

Shutterstock

Minimizing contact between wine and oxygen

From my years researching wine chemistry and wine oxidation, I know minimizing contact between wine and oxygen is vital for stopping the onset of oxidative spoilage. Sealing the bottle is essential.

The carbon dioxide in sparkling wine is more soluble in wine at a lower temperature, so storing the wine in the refrigerator is also beneficial. In other words, you’ll retain more bubbles if you stick it in the fridge.

Some even claim the teaspoon must be silver, not stainless steel, although the basis for this seems highly speculative.

People clink champagne glasses together at a party.

If you plan to keep your leftover sparkling wine, store it properly.

Shutterstock

Bubble behavior

It is important to note some of the critical features of sparkling wine bubbles.

In his book Uncorked: The Science of Champagne, champagne researcher Gérard Liger-Belair demonstrated the amount of carbon dioxide lost depends on the way the wine is poured into the glass.

Pouring into a tilted glass retains more carbon dioxide than pouring into a vertical glass. Using bubble imaging techniques, Liger-Belair was able to track the flow of the bubbles in a glass.

He separately showed the bubbles are in fact aerosols (a suspension of fine solid particles or liquid droplets in air) containing aroma compounds that affect the taster’s impression. The release of bubbles even depends on the inside surface of the glass.

Bubble behavior is therefore complex. Any study on them needs to be replicated to ensure one is measuring a real effect and a one-off.

A person pours champagne into a tilted glass.

The release of bubbles even depends on the inside surface of the glass.

Shutterstock

A key study on ‘the myth of the teaspoon’

One such on champagne by Michel Valade and colleagues was published in the periodical Le Vigneron Champenois in 1994.

The work, titled Le mythe de la petite cuillère – the myth of the teaspoon – was designed to address the claim that a teaspoon, preferably a silver one, could (according to my translation):

defy all the laws of physics and possess some legendary efficiency to protect the bubbles escaping from an open bottle.

These researchers used three strategies to assess the impact of bubble conservation on the wine: the change in pressure, the loss of weight and sensory analysis.

After opening, the wine was decanted, leaving 500 milliliters in one set and 250 milliliters in a second set.

The wines were then stored at 12℃ with four methods to conserve the bubbles: open bottle, silver teaspoon, stainless steel teaspoon, cork stopper (which uses a hermetic seal) and crown seal (a metal lid with crimped edges, like you often see on a beer bottle). Each approach was performed in triplicate.

The researchers then analyzed how pressure inside the bottle changed (measured in a unit called atmospheres; 1 atmosphere is about 101 kilopascals). The initial bottle pressure was 6 atmospheres, dropping after decanting to 4 atmospheres when there was 500 milliliters remaining. When only 250 milliliters remained, the pressure was just 2 atmospheres.

After 48 hours storage, the pressure in open bottles and those with a teaspoon inserted in the neck had dropped by a further 50%, indicating a significant loss of bubbles.

Clearly there was no teaspoon effect. Those sealed with a cork stopper or crown seal had a pressure drop of only 10%, demonstrating the significant advantage of using a proper closure.

An open champagne bottle emits fizz and gas.

The source of bubbles in sparkling wine is the carbon dioxide released during the secondary fermentation.

Shutterstock

These researchers also measured the change in the weight of bottles stored three different ways: fully open, tightly sealed or with an inserted teaspoon.

No decrease in weight was observed for the tightly sealed bottles. But for the fully open bottles and those with a teaspoon in the neck, the loss in weight was significant.

To finalise the evidence to dispel the myth of the teaspoon, the wines were subjected to sensory analysis by expert champagne tasters.

All wines showed some characteristics of oxidation, due to oxygen getting in during opening. However, those sealed with a hermetic seal were clearly more effervescent and livelier than those unsealed or with an inserted teaspoon.

Clearly, the teaspoon effect is a myth.

So, if you need to store a partly-used bottle, go and buy a proper sparkling wine stopper.The Conversation

Geoff Scollary, Adjunct Professor, Charles Sturt University

This article is republished from The Conversation under a Creative Commons license. Read the original article.









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