I think that no matter what, that you can smell a drink with alcohol in it. But some say you can’t smell Vodka, or that if you can, then it wasn’t made right.
Origins, From: http://www.epinions.com/fddk-review-4638-1674D9F3-3902151C-prod2
Vodka, by law, is a colorless, odorless product. Most people would not argue that Vodka is clear but many may contend that it does have an odor. In fact good Vodka will not have any odor other the smell associated with the alcohol.
Smirnoff is the standard that all vodkas are judged by. The product is a perfect choice for mixed drinks, martinis or straight on the rocks. Smirnoff is available in any establishment that sells or serves alcoholic beverages.
Origins, From: http://www.coolquiz.com/trivia/names/names.asp?name=smirnoff
The bottles were then shipped off to the south. The salesman accompanying them was curious about this colorless whiskey and sampled it. Right away he came up with a slogan to advertise the product: “Smirnoff’s White Whiskey, No Taste, No Smell.” He sold out right away. Smirnoff’s is today the best-selling liquor in the United States.
Origins, From: http://www.boiseweekly.com/comments.php?id=1549_0_1_0_C
While still popular amongst some for the rebelliousness of drinking a spirit from Mother Russia, Smirnoff needed some damage control on the brand and advertised it as using 100 percent American grain and the fact that “it leaves you breathless,” marketing the fact that it takes a stronger nose to smell vodka on someone’s breath than to smell bourbon. Using celebrities like Groucho Marx, Woody Allen and Zsa Zsa Gabor to “endorse” Smirnoff in legendary ad campaigns helped make vodka, especially the Smirnoff brand even more popular.
Smell, From: http://www.pitch.com/issues/2004-03-11/calendar/stpats.html
Alcohol by itself doesn’t have a very strong smell. Whenever somebody’s been drinking for a while, and they have this really strange breath? That’s the metabolites from the alcohol – ketones and things like that. Those are metabolic byproducts of alcohol, and they give you a really funny smell on your breath. When you start drinking, the alcohol’s being absorbed and being metabolized … but ketones don’t get metabolized. They’re in your blood, and your blood and your lungs exchange – that’s how you breathe – and these things will come out in your lungs, and you’ll be breathing them for hours. So there’s no way to cover it up and totally fool everybody all the time after a certain point. You can probably get away with one, but, you know, anything more than that, it’s going to show one way or another.
If someone takes a straight shot of alcohol, like vodka or something, and you immediately smell their breath, it’s not very strong, but you can still smell something. With time, it goes away. If you take the same amount of vodka and dilute it with water, it doesn’t smell as strong. But again, that’ll go away with time because the volatile things will be breathed out.
Smell, From: http://www.emedicinehealth.com/articles/11412-2.asp
There is a very poor correlation between the strength of the smell of alcohol on the breath and the BAC. Pure alcohol has very little smell. It is the metabolism of other substances in alcoholic beverages that produces most of the smell. This explains why a person who drinks large amounts of high-proof vodka (a more pure form of alcohol) may have only a faint smell of alcohol on the breath. On the other hand, a person who drinks a modest amount of beer may have a strong smell of alcohol on the breath.