Hey guys,
A friend of mine is doing an investigative report on whether local nightclubs are watering down their vodka and asked for my help as she knows nothing about chemistry (she's doing a journalism course so it's not a homework question!).
She wanted to know what the easiest way to detect this phenomenon is; and the first thing that popped into my head was fractional distillation, i.e. see how much ethanol comes out of the vodka at 78*C compared to a control. Taste and smell are obvious but not concrete enough. Can anyone else suggest a simple technique? As I said it's not a chemistry report so it doesn't have to be something ridiculously accurate, just conclusive.