Direct analysis in real time

[amywy88]

Why is Helium the best gas for use with DART?

[gen2]

Direct Analysis in Real Time (DART)

The DART negative-ion reagent mass spectra are virtually identical for nitrogen, neon and helium. However, negative-ion sensitivity increases for DART gases in the following order:

nitrogen < neon < helium

This is due to the increased efficiency in forming electrons by Penning ionisation and surface Penning ionisation as the internal energy of the metastable species increases.

You can read more about it in this .pdf file

http://www.jeolusa.com/SERVICESUPPORT/Applicat ionsResources/AnalyticalInstruments/DocumentsD ownloads/tabid/337/DMXModule/693/Command/Core_ Download/Default.aspx?*******=302

[gen2]

Let's try hiding it and see if it works.

Link to .pdf file

[gen2]

No, they've nobbled it there too.

Well, since you are studying this kind of stuff I reckon you are brainy enough to reconstruct the URL by replacing the seven stars with
Entry
+ Id

combined as a single word with no spaces and two capital letters.