Elements/Cations
Clicking the Elements/Cations button opens the analyzed and specified elements dialog box.
The analyzed and specified dialog box lists the currently selected elements for analysis. If this is the first sample of a new run then no analyzed elements are present. To edit or add elements, one of the following procedures may be performed :
1. Click the Load Element Setup button to load previously saved element setups from the element setup database. Element setups in samples created before the current sample may be saved as element setups from the Elements/Cations button in the Analyze! window.
2. Click the Load Sample Setup button to load a previously saved sample setups in the currently open run. Samples created before the current sample may be saved as a sample setup from the Elements/Cations button in the Analyze! window. If you are loading a multiple sample setup, only one column condition will be preserved. You need to check and set it for the appropriate setting for your next step, e.g. peaking.
3. Click the grid row of the element of interest or an empty row to add new elements. This action activates the element properties dialog box. One then selects an element by either typing the element symbol or by clicking the drop down list of all elements and scrolling to and highlighting the desired element.
Default settings for the analyzed x-ray line, cations, and oxygen proportions are loaded automatically. These can be edited via the drop down menu associated with each based on the user's preferences.
The cation/oxygen ratios (subscripts) for Fe:O are calculated here for those performing “what if” calculations for testing the variations in the relative amounts of FeO and Fe2O3 in cases where it is a valid exercise (e.g., typical volcanic glasses and some minerals). It is valid first, to show the effect of changing the oxygen abundance in a matrix correction and second, to see the effect on the analytical total:
|
Fe |
O |
Fe2+ |
Fe3+ |
|
1 |
1 |
100 |
0 |
|
8 |
9 |
85 |
15 |
|
7 |
8 |
83 |
17 |
|
6 |
7 |
80 |
20 |
|
5 |
6 |
75 |
25 |
|
7 |
9 |
60 |
40 |
|
3 |
4 |
50 |
50 |
|
5 |
7 |
33 |
67 |
|
2 |
3 |
0 |
100 |
Leave the x-ray line field blank to indicate an unanalyzed element (specified, by difference or by stoichiometry or by formula basis calculations). The defaults for these fields can be modified in the ELEMENTS.DAT file in the Probe for EPMA directory. Note that Probe for EPMA will retain any modifications of these defaults for the duration of the run.
Disable Acq