Bond's not exactly sure what the two scientists are up to, so when they leave the room, he sneaks for a closer look.
"Doesn't look alcoholic ... damn."
Now, Bond's not a scientist (unless you count excessive drinking and spreading venereal disease as a "science"), so it's no surprise that he can't figure out the chemical properties of a solution by simply picking it up and staring. So instead of, say, taking a couple of vials back to Q for analysis, 007 opens one of the vials and leaves it standing in a precarious position before dashing secretively out of the room.
"This is going to be hilarious!"
Not surprisingly, when the scientists come back, they knock over the vial ...