Following the White Rabbit

[shalathief]

"Renato Zenobi and Huanwen Chen at ETH Zurich in Switzerland and their colleagues blow a stream of nitrogen, a neutral gas, across a surface and collect a sample of what is dislodged. The sample is then transported to an extractive electrospray ionization mass spectrometer, where it can be directly analysed for its chemical composition. Using the

Comments

[sundae1212]

so wait, does it take the different in the amount of caffeine in the skin or in the mouth or what?

[shalathief]

I think the skin.