| EDP
XRF |  |
| type | SPECTRO
XEPOS |
| spec | Portable
Energy Dispersive Polarization X-ray Fluorescence analyzer (EDP-XRF) with 12-sample
autosampler |
| Gas
supply | bottled
Helium for improvement of sensitivity for light elements. one 50L bottle is good
for approx. 1000 samples |
| methods |
SPECTRO XEPOS uses a Pd-target
end window tube at a maximum power of 50 W and a maximum voltage of 50 kV. The
excitation radiation is optimised for different groups of elements using three
different targets for modification: |
| x-ray
tube | Varian
VF-50J-Pd industrial x-ray tube wit 0.003" Beryllium window
Anode: copper body with Palladium target.
Target angle: 90° from central ray. focal spot: 1x1mm square |
| modification
targets |
| Target | Voltage | Time | Elements |
| Mo secondary target | 45
kV | 100 s | Cr-Y,
Hf-U | | Al2O3
polarisation target | 49.5
kV | 100 s | Zr-Ce |
| HOPG crystal | 25
kV | 100 s | Mg-V |
|
| samples |
our standard samples are
a approximately 4 grams of freeze dried powdered sample in a cuvette with mylar
foil bottom. |
| Elements |
|
H | | | | | | | | | | | | | | | | | He |
| Li | Be | | | | | | | | | | | B | C | N | O | F | Ne |
| Na | Mg | | | | | | | | | | | Al | Si | P | S | Cl | Ar |
| K | Ca | Sc | Ti | V | Cr | Mn | Fe | Co | Ni | Cu | Zn | Ga | Ge | As | Se | Br | Kr |
| Rb | Sr | Y | Zr | Nb | Mo | Tc | Ru | Rh | Pd | Ag | Cd | In | Sn | Sb | Te | I | Xe |
| Cs | Ba | L | Hf | Ta | W | Re | Os | Ir | Pt | Au | Hg | Tl | Pb | Bi | Po | At | Rn |
| Fr | Ra | A | | | | | | | | | | | | | | | |
| | L | La | Ce | Pr | Nd | Pm | Sm | Eu | Gd | Tb | Dy | Ho | Er | Tm | Yb | Lu | |
| | A | Ac | Th | Pa | U | Np | Pu | Am | Cm | Bk | Cf | Es | Fm | Md | No | Lr | |
|
|
| the
XEPOS is actually capable of measuring elements from Mg - U. the marked elements
have concentrations in marine sediments that are well detectable with the machine |
| reference
materials | MAG
1, SDO-8 and PACS-1- sediment standards |
| tips
+ tricks | |