Calculate Standard Concentrations (Output Calculated Concentrations and Errors)
Calculate composition of standard from raw k-ratio ACII input data from .DAT file. Data file format assumes one line for each composition. See Output menu in Probe for EPMA to create an export file of all standards in a probe run. See sample file CALCZAF2.DAT for the input format.
This menu calculates standard composition using a special “Standard” single line input format that can be created using Probe for EPMA from previously acquired standard samples. The input file format is as follows:
The first column is "standard name" in double quotes.
The second column is the takeoff angle.
The third column is the kilovolts.
The fourth column is the oxide or elemental flag (1 = elemental, 2 = oxide).
The fifth column is the number of elements.
The next n columns are the element symbols (use double quotes).
The next n columns are the element x-ray lines (use double quotes) (leave empty for specified concentration, must be last element(s)).
The next n columns are the measured k-ratios for each element (blank for specified concentration).
The next n columns are the "published" weight percent for each element.
The next n columns are the primary standard number assignment for each element.
The next n columns are the number of cations per element.
The next n columns are the number of oxygens per element.
The following is an example of the output created using this menu. The first line has oxygen measured and the second line has oxygen specified using the value from the standard database
"Fayalite", 40.0, 15.0, 2, 3, "fe", "si", "o", "ka", "ka", "ka", .7372, .2523, 1.0086, 54.809, 13.785, 31.407, 895, 14, 895, 1, 1, 1, 1, 2, 0
"Fayalite", 40.0, 15.0, 2, 3, "fe", "si", "o", "ka", "ka", "", .7372, .2523, 0.0, 54.809, 13.785, 31.407, 895, 14, 0, 1, 1, 1, 1, 2, 0
The output format is as follows:
Line Standard file row number (simple increment)
Name Standard name in double quotes
keV Standard keV
Takeoff Standard take off angle" & VbDquote$ & vbTab
<element> Kraw Element raw k-ratio
<element> Krat Element elemental (normalized) k-ratio
<element> Publ-Krat Element elemental (normalized) k-ratio (from STANDARD.MDB composition)
<element> Wt% Element elemental calculated weight percent
<element> Wt% Element oxide calculated weight percent
Total Calculated total
<element> Publ Element elemental weight percent from STANDARD.MDB file
Publ Total Total from STANDARD.MDB file
<element> Conc Error Element relative error from calculated to published weight percent (1.0 = zero error)
<element> Pri F(Chi) Element generated intensity
<element> Sec F(Chi) Element emitted intensity
<element> Absorp Element absorption correction
<element> Fluor Element fluorescence correction
<element> Zed Element atomic number correction
<element> Stp Element stopping power correction
<element> Bks Element backscatter correction
<element> ZAF Element ZAF (full) correction