The sample, a ground powder without binder, was pressed at 18 tons pressure in a 35 mm backing cup, analyzed on the Rigaku ZSX Primus using the very simple EZ Scan semi-quantitative analysis routine, only taking approximately 8 minutes for the analysis. The scan is shown in Figure 1.
Figure 1
It turned out that their test sample was, in fact, NIST-679 Brick Clay. Table 1 compares the SQX results to the NIST-679 certificate:
|
BC-Pet |
NIST |
Tol |
||
|
Unknown |
Mass% |
±Mass% |
||
|
Na |
0.0636 |
0.1304 |
0.0038 |
|
|
Mg |
0.4083 |
0.7552 |
0.0088 |
|
|
Al |
11.3195 |
11.02 |
0.34 |
|
|
Si |
22.1646 |
24.34 |
0.3 |
|
|
P |
0.0712 |
0.075 |
NCV |
|
|
K |
2.5621 |
2.433 |
0.047 |
|
|
Ca |
0.1754 |
0.1628 |
0.0013 |
|
|
Ti |
0.5375 |
0.577 |
0.033 |
|
|
Cr |
0.0126 |
0.011 |
0.0005 |
|
|
Mn |
0.1694 |
0.173 |
NCV |
|
|
Fe |
8.8686 |
9.05 |
0.21 |
|
|
Zn |
0.0113 |
0.015 |
NCV |
|
|
Rb |
0.0194 |
0.019 |
NCV |
|
|
Ca |
0.0632 |
0.0432 |
0.00098 |
|
|
Ce |
0.0051 |
0.0105 |
NCV |
|
|
O |
53.554 |
Table 1 (NCV = non-certified value)
The Rigaku ZSX Primus is a 4KW WDXRF system that, in addition to bulk analysis, offers mapping and small spot analysis (spatial resolution of 0.5 mm), with an analytical capability from B - U.
Tags: XRF, Primus, WDXRF, semi-quantitative analysis
