"*SIGH*
To start off im not claming to be a expert on the subject, as it is impossible for anyone to be, but i will explain to the best of my ability what I think about the subjects at hand.

First off the original article; I think it would work best if you just included a solute of about 80% sweat and 20% blood. The reason behind this is that if the zombies rely on their sense of smell (which should be just as good if not worse than a humans) then your gonna want to use mostly sweat as this is gonna be the most common human manufactured smell in the air at the time and what the Skin Jobs will lock onto (think about all the running and activity, plus the decrease in personal hygiene). Blood comes second and in smaller amounts as this will probably be the second most common substance from the list during a ZED infestation. As for the idea of using it after the zombie has seen you, i agree with Dooran. The zombie wants you, not a small glass vial of your fluids. Although in large enough quantities it should attract a horde of zombies to a trap you might have set up (hypothetically speaking ofcourse).

Now onto the response by Adroc (sorry to pick you out dude but you kinda walked into it)
Raw Meat? Seriously. How well do you really think this will work? To start off, most raw meat doesnt give any real noticable odor (rancid meat certainly does though). This would lead to a very ineffective lure (id go with the sweat/blood solute i mentioned earlier just in a larger quantity). Zombies arnt interested in dead people, so what makes you think they are gonna be interested in dead animals? Zombies are attracted to the smell of a living person, and that will be the most effective lure there (and loud noise).

If you really want to attract zombies into a trap use a large amount of sweat (good luck harvesting it) and shoot a gun a few times in the air.

Sorry for the random typos, had a lot to type. Heh..."