To All,

We have the HORIBA XGT-1000  ED  X-Ray Fluorescence  system intrument. It
has the vacuum mode for sample analysis – The switching between the two
modes takes just a few seconds. In Vacuum Mode , when t entire sample
chamber is subjected to vacuum conditions the S and Cl show up in material
ID spectra, but not as "Other Elements" (in the RoHS specta) under
atmospheric pressure.

Can anyone explain this?

Best regards,

Annemiek Blair
QA Laboratory Chemist
Pechiney Plastic Packaging
150 26th Ave SE
Minneapolis, MN 55414
612-378-3310