How can you tell if a wine is spoiled? How can you tell if a wine has gone bad?

The difference between a wine and its aroma and taste can be determined by looking at the color, aroma and taste of the wine

1. Color. If a red wine is dull in color, dull and has an abnormal brown color, it may have been over-oxidized or otherwise contaminated. A white wine.

It has a very dark yellow color, and it may also have undergone excessive oxidation. In addition, if the color of the wine is cloudy and snowflake-like, it is basically considered that the bottle has gone bad. It is important to note that some older wines will have some sediment, which is the color and tannins of the wine over time.

and other substances will combine, which is a normal phenomenon.

2. Aroma. If the wine smells moldy, stale,, or wet cardboard, the bottle may be over-oxidized. When the wine is damaged due to sulfur oxide, the smell is particularly strong and very pungent.

After taking a deep breath, you can feel a noticeable odor at the tip of your nose. If you are in doubt about the quality of the wine, you can cover the rim with the palm of your hand, then shake the glass up and down vigorously, and when you open the palm of your hand, you can inhale the smell coming from the glass immediately.

3. Taste. The most direct way to tell if a wine has gone bad or bad is to smell it and take a sip. Spoiled wine generally has a damp smell and rancid smell.

In addition, it is necessary to carefully distinguish whether the tongue, the inside of the cheeks, the upper and lower palate, and the throat feel abnormal tingling and bitterness.

First of all: look at the vintage, the above mentioned the issue of drinking period, if a wine is more than 10 years old, then in terms of probability, this wine is actually not suitable for drinking, it is recommended not to buy it directly.

Secondly, after opening, look at the color of the wine, it will be divided into the edge of the wine, the edge of the wine, the edge of the water, observe the width of the edge of the wine, if the width is wider, the older the year, if the color has appeared brown, it means that it has entered the decline period, if it has shown obvious brown, then it is no longer suitable for drinking.

Third, observe the cork, if the cork has rotted and has a peculiar smell after opening, then it also means that there is a problem with the wine!

Look at the color: If the red wine is cloudy in color and has a snowflake-like shape, it is spoiled. It is important to note that some older wines will have some sediment, which is normal for the pigments and tannins of the wine to combine over time.

Smell: If the wine smells moldy, stale,, or wet cardboard, the bottle may be over-oxidized. Taste the taste:

If you dip a small amount of red wine into it, if it has a sharp and sour taste and bitterness, it means that the red wine has gone bad. <

1. Look at its color: If the red wine is cloudy in color and has snowflakes, it is spoiled. It is important to note that some older wines will have some sediment, which is normal for the pigments and tannins of the wine to combine over time.

2. Smell the aroma: If the red wine smells moldy, stale,, or wet cardboard, the bottle may be over-oxidized. When red wine is caused by sulfur oxide, the smell is particularly strong and very pungent. After taking a deep breath, you can feel a noticeable odor at the tip of your nose.

3. Taste: Dip a small amount of red wine, if there is a sharp and sour feeling and bitterness in the taste, it means that the red wine has deteriorated.

1. The clarity of the wine. If the wine is cloudy and has snowflakes, it should be assumed that the wine has gone bad. However, it is normal for older red wine to have precipitation, because over time, substances such as pigments and tannins will combine to produce sediment.

In addition, some wines that are only 1 or 3 years old have crystals at the bottom of the bottle, and they are basically not damaged, which is caused by the fact that the winery did not treat it well when it was frozen, but it does not affect the quality of the wine.

2. Cork flavor. The smell is similar to the rancid stench emitted by a rotten wooden stopper. If the cork dissipates after a quarter of an hour of pouring the wine into the glass, it does not affect the drinking of the wine; If the smell persists, the wine has gone bad.

3. Oxidizing taste. This is due to the deflated mold and spoilage of the wine, and the spoilage of horse urine when tasted. Oxidized liquor is basically bad liquor.

However, fortified wines such as Sherry, Porto and Maderazed in Portugal are normal if they have an oxidized taste.

4. Sulfur dioxide smell. Most of this smell is due to the over-treatment of sulfur in the brewing process – the winemaker needs to use sulfur to sterilize the fermentation, and the sweet, semi-sweet wine also uses a higher sulfur to stop fermentation because of the high sugar content. This smell is often found in cheap liqueurs, which makes the throat dry and uncomfortable to drink.

5 rotten eggs and rubber flavor. This smell is mixed with hydrogen sulfide and is often found in red wines with high ambient temperatures, and if left untreated, it can develop into a distinctly sewage-like odor. Some small wines have a small amount of this flavor, but it usually dissipates quickly after pouring the glass.

6 acetic acid. After the wine is opened, it will be eroded by the vinegar stick wine and become sour when it comes into contact with the air for a long time. If the wine is fermented at a high temperature and is not carefully bottled, acetic acid will also form.

If the wine leaks in the barrel or bottle, such as the cork is insect-like, dried up, and seeps into the air, the wine will go bad or have this smell.