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Table T3. Precision and accuracy for major and trace element analyses by ICP-AES, Expedition 329.
|
|
Wavelength accepted
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BCR-2 (n = 24)
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BAS-206 (n = 8)
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Accepted international
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Shipboard average
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Uncertainty
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SD (%)
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Accepted average*
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Shipboard average
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Uncertainty
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SD (%)
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Major element oxide (wt%):
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SiO2
|
251.611
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54.1
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54.6
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0.65
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1.19
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49.29
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49.4
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0.86
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1.75
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Al2O3
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396.152
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13.6
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13.5
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0.39
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2.92
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14.46
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13.8
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0.15
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1.06
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Fe2O3(T)
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239.563
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13.4
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14.0
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0.26
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1.87
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15.48
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14.5
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0.13
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0.89
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MnO2
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257.61
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0.2
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0.2
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0.01
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5.15
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0.26
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0.2
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0.02
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6.54
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MgO
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285.213
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3.4
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3.9
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0.18
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4.51
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6.94
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6.8
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0.10
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1.54
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CaO
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317.933
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7.0
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7.4
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0.30
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4.05
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9.63
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9.8
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0.29
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2.99
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Na2O
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589.592
|
3.3
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3.4
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0.25
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7.33
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2.72
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2.8
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0.05
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1.79
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K2O
|
766.491
|
1.7
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1.8
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0.09
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4.69
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0.16
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0.2
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0.06
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25.75
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TiO2
|
337.28
|
2.3
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2.2
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0.10
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4.51
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2.12
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1.9
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0.07
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3.40
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P2O5
|
214.914
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0.4
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0.4
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0.06
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13.25
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0.20
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0.2
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0.05
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19.92
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Trace element (ppm):
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Ba
|
493.409
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683
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540
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98.37
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18.22
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44.7
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14.3
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36.97
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258.73
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Co
|
228.615
|
42
|
51
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2.64
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5.22
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53.8
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59.8
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3.47
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5.80
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Cu
|
324.754
|
19
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NR
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—
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—
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67.9
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58.6
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8.61
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14.68
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Ni
|
231.604
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12
|
11
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3.62
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32.79
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51.2
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49.2
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2.32
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4.72
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Sc
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361.383
|
33
|
33
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1.08
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3.29
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46.9
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50.2
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0.54
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1.08
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Sr
|
407.771
421.552 |
346
|
342
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13.24
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3.87
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100.1
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99.5
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2.48
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2.50
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V
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292.401
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416
|
411
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8.18
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1.99
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469.0
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455.0
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6.04
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1.33
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Zn
|
213.856
|
127
|
132
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5.93
|
4.49
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192.3
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125.6
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3.49
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2.78
|
|
Zr
|
343.823
|
188
|
179
|
12.89
|
7.19
|
124.5
|
112.6
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2.90
|
2.58
|
* = based on multiple repeat runs of BAS-206 standard against known internationally accepted standards carried out at the National Oceanography Centre, Southampton, United Kingdom. n = number of replicates, SD = standard deviation. NR = not reported, — = not analyzed.
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