|
Table 3. Mean (also minimum and maximum) of ratio of best values (BV, this lab) to recommended, consensus, or working values (RV, literature), with 95% confidence limits on ratios. |
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|
|
BV / RV |
|
|
|
|
|
BV / RV |
|
|
||||
|
n |
min |
max |
mean |
±95% |
signif. |
|
|
n |
min |
max |
mean |
±95% |
signif. |
|
Na |
24 |
0.972 |
1.014 |
1.001 |
0.004 |
|
|
La |
23 |
0.906 |
1.016 |
0.990 |
0.011 |
|
|
K |
2 |
0.957 |
0.997 |
0.977 |
— |
|
|
Ce |
23 |
0.915 |
1.090 |
0.998 |
0.017 |
|
|
Ca |
14 |
0.950 |
1.037 |
1.006 |
0.015 |
|
|
Pr |
16 |
0.889 |
1.026 |
0.954 |
0.020 |
X |
|
Sc |
21 |
0.870 |
1.074 |
0.976 |
0.021 |
X |
|
Nd |
19 |
0.890 |
1.015 |
0.967 |
0.014 |
X |
|
Cr |
20 |
0.675 |
1.051 |
0.955 |
0.047 |
|
|
Sm |
24 |
0.944 |
1.055 |
1.000 |
0.011 |
|
|
Cr* |
16 |
0.840 |
1.051 |
0.994 |
0.029 |
|
|
Eu |
22 |
0.832 |
1.010 |
0.955 |
0.019 |
X |
|
Fe |
26 |
0.953 |
1.011 |
0.987 |
0.006 |
X |
|
Gd |
21 |
0.830 |
1.158 |
0.962 |
0.037 |
X |
|
Co |
21 |
0.965 |
1.154 |
1.033 |
0.022 |
X |
|
Tb |
18 |
0.895 |
1.033 |
0.959 |
0.019 |
X |
|
Ni |
7 |
1.000 |
1.055 |
1.025 |
0.021 |
X |
|
Dy |
21 |
0.931 |
1.129 |
1.040 |
0.023 |
X |
|
Zn |
5 |
0.991 |
1.080 |
1.029 |
0.041 |
|
|
Ho |
10 |
0.918 |
1.078 |
1.036 |
0.033 |
X |
|
As |
3 |
0.988 |
1.043 |
1.013 |
0.070 |
|
|
Er |
14 |
0.815 |
1.200 |
1.033 |
0.054 |
|
|
Se |
2 |
0.921 |
1.143 |
1.032 |
— |
|
|
Tm |
10 |
0.929 |
1.077 |
0.979 |
0.035 |
|
|
Rb |
24 |
0.918 |
1.080 |
0.997 |
0.015 |
|
|
Yb |
19 |
0.900 |
1.065 |
0.990 |
0.020 |
|
|
Sr |
20 |
0.936 |
1.045 |
1.014 |
0.012 |
X |
|
Lu |
13 |
0.904 |
1.075 |
0.964 |
0.029 |
X |
|
Y |
21 |
0.887 |
1.114 |
1.013 |
0.033 |
|
|
Hf |
22 |
0.986 |
1.054 |
1.027 |
0.010 |
X |
|
Zr |
16 |
0.911 |
1.147 |
1.011 |
0.033 |
|
|
Ta |
15 |
0.874 |
1.007 |
0.936 |
0.021 |
XX |
|
Sb |
11 |
0.907 |
1.016 |
0.962 |
0.022 |
X |
|
W |
3 |
0.895 |
1.077 |
1.010 |
0.248 |
|
|
Cs |
17 |
0.922 |
1.060 |
1.001 |
0.017 |
|
|
Th |
19 |
0.920 |
1.074 |
0.959 |
0.018 |
X |
|
Ba |
23 |
0.906 |
1.020 |
0.977 |
0.012 |
X |
|
U |
13 |
0.907 |
1.033 |
0.971 |
0.023 |
X |
|
n = Number of geostandards compared. X = The mean ratio is significantly different from unity, but within 5%. XX = The mean ratio is significantly different from unity by more than 5%. * Excludes geostandards with <15 µg/g Cr for which RVs are suspected to be high; see text. Italicized elements: best values are estimated from concentrations for other REE elements; see text. Based on comparisons for AGV-1, BCR-1, G-2, GSP-1, PCC-1, BHVO-1, MAG-1, QLO-1, RGM-1, SCo-1, SDC-1, SGR-1, STM-1, AC-E, AN-G, BE-N, BR, DR-N, DT-N, FK-N, GA, GH, GS-N, MA-N, Mica-Fe, Mica-Mg, PM-S, UB-N, and WS-E (12–14, 26–29). Includes only high-precision data, i.e., those for which the confidence limits are <10% of the concentration values. There is an insufficient amount of high-precision data to make comparisons for Br, Ag, Cd, Ir, Au, and Hg. |
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