Wine faults Flashcards
What are the odors related to cork taint or a corked wine
Musty, moldy odor similar to dank basement
What causes cork taint
A mold that grows on the bark of the cork tree
What does mold do in a wine
It interacts with other components of wine and generates a chemical known as 2,4,6 TCA
Can TCA transfer into wine if it is in the winery environment
Yes it can be transfer into wines even when the wines are sealed with screw caps
What concentrations of TCA are detectable by humans
2-7 parts per Trillion
Name the odors resulting from sulfur compounds
Sulfur dioxide, hydrogen sulfide, mercaptan
What odors does sulfur dioxide give out in wine
High concentrations of SO2 gives out smell of burnt matches
If the wine is highly acidic, SO2 will be
More pronounced
When a sulfur rich wine sits for too long in absence of oxygen, it develops odor of
Rotten eggs
What causes the odor of rotten eggs in wine
Hydrogen sulfide(H2S)
Problem of H2S is more prominent in
Wines closed with screw caps and in a barrel where wine rests for long with lots of yeast sediments
What odor is related with Mercaptan
Garlic or onions
What causes ethyl mercaptan in wine
Combination of sulfur and ethanol
Mercaptan is used in
Odorless gases to detect leak
Name the odors caused from bacteria
Acetic acid, butyric acid, lactic acid, ethyl acetate, geranium
What odor does acetic acid give
Vinegar
Butyric acid gives odor of _____
Rancid butter or spoiled cheese
What odor does lactic acid gives to a wine
Odor of sauerkraut or goat
Odor of nailpolish remover or model airplane glue describes what
Ethyl acetate
Ethyl acetate is formed through the reaction of
Ethanol and acetic acid
Incomplete MLF leads to odor of
Crushed geranium leaves
Brett is short for
Brettanomyces, a member of yeast family
What are the odors related to brett
Odors like sweaty or horsey, band-aid like or medicinal
What is odor related to green and where does it come from
Like leaves, usually resulting from the use of under ripe grapes
Oxidized means
Oxygen from air dissolves in wine that has been exposed to air
Where does acetaldehyde come from
When oxygen reacts with phenolic compounds in wine, oxidative reaction creates acetaldehyde
Deliberate oxidation is used in
Fino sherry production
Oxidation gives wine _____ aromas
Nutty and caramelized character
What is the negative effect of oxidation on wine
Lack of fruit character and browning of wine
What is Maderized
It is a cooked or a baked odor, resulting from excessive heating or oxidization
Maderization is acceptable in making _____
Madeira
Moldy odor is comes from
Use of moldy grapes or moldy barrel
Odor of rubber is related to
Very low acid wines or excess sulfur
What is a stemmy odor
bitter and green odor of grape stems
The odor of wet cardboard is associated with
Corktaint or misuse of filter pads or filtering materials
A papery chemical odor best describes
Wet cardboard
Yeasty and leesy odor comes from
This odor may develop if the wine remains in contact with the yeast cells for too long.
Can yeasty odor be acceptable in any wine
It is acceptable for Sparkling wines and wines that are intentionally aged on lees
Define reduction
A term that refers to a smell of rotten eggs, garlic, cabbage, burnt rubber or struck matches. It develops in conditions that lack oxygen
A stale water odor refers to
Stagnant
