Table T4. Minor element precision figures for five XRF runs of Sample 171B-1049C-8X-5, 88-90 cm.
| Element (ppm) |
Mean (N = 5) |
Standard deviation* |
Standard error |
95% confidence |
99% confidence |
|---|---|---|---|---|---|
Nb |
7.800 |
0.316 |
0.141 |
0.393 |
0.651 |
Zr |
92.820 |
4.194 |
1.875 |
5.207 |
8.633 |
Y |
9.580 |
0.268 |
0.120 |
0.333 |
0.552 |
Sr |
308.720 |
8.574 |
3.834 |
10.645 |
17.649 |
U |
5.160 |
1.742 |
0.779 |
2.162 |
3.585 |
Rb |
29.380 |
1.499 |
0.670 |
1.861 |
3.086 |
Th |
7.200 |
0.515 |
0.230 |
0.639 |
1.060 |
Pb |
7.600 |
1.725 |
0.771 |
2.142 |
3.551 |
Zn |
64.640 |
2.134 |
0.954 |
2.649 |
4.392 |
Cu |
31.140 |
1.587 |
0.710 |
1.970 |
3.266 |
Ni |
232.440 |
3.890 |
1.740 |
4.830 |
8.008 |
Cr |
49.760 |
0.961 |
0.430 |
1.193 |
1.978 |
Ce |
27.860 |
6.222 |
2.783 |
7.726 |
12.809 |
Nd |
6.360 |
3.088 |
1.381 |
3.834 |
6.356 |
La |
11.600 |
10.034 |
4.487 |
12.458 |
20.655 |
V |
79.760 |
2.855 |
1.277 |
3.545 |
5.878 |
Ba |
36.860 |
4.028 |
1.801 |
5.001 |
8.291 |
Sc |
14.580 |
2.030 |
0.908 |
2.521 |
4.179 |
I |
7.200 |
3.641 |
1.628 |
4.520 |
7.494 |
Br |
19.220 |
1.506 |
0.673 |
1.869 |
3.099 |
Mo |
1.540 |
0.230 |
0.103 |
0.286 |
0.474 |
Note: * = in standard deviation units; all other units are the same as elemental abundance.