Table T7.Estimates of accuracy and precision for JY2000 ICP-AES major and trace element analyses.
Standard
Date
(2003)
Major element oxide (wt%)
SiO2
TiO2
Al2O3
Fe2O3
MgO
MnO
CaO
Na2O
K2O
P2O5
Total
ROA-3* 15 May 48.93 0.71 8.33 8.85 25.68 0.15 7.61 0.83 <0.01
101.09

15 May 47.80 0.72 8.39 8.85 25.44 0.15 7.86 0.85 <0.01
100.06

26 May 48.37 0.68 8.08 8.42 24.53 0.15 7.55 0.81 0.01 0.03 98.63

30 May 46.00 0.72 8.33 8.84 26.41 0.16 7.73 0.84 <0.01
99.03

30 May 44.95 0.69 8.12 8.46 25.08 0.15 7.58 0.82 <0.01
95.85

1 Jun 46.49 0.68 8.27 8.65 26.82 0.16 7.75 0.83 <0.01
99.65

4 Jun 45.52 0.70 8.01 8.66 25.21 0.16 7.85 0.86 <0.01
96.97

7 Jun 48.68 0.70 8.14 8.65 25.36 0.16 7.79 0.85 <0.01
100.33

9 Jun 48.01 0.68 8.25 8.77 24.95 0.16 7.80 0.87 0.01
99.50

13 Jun 47.48 0.69 8.07 8.52 25.57 0.16 7.70 0.89 0.01
99.09

14 Jun 45.86 0.70 8.37 8.05 25.46 0.15 7.70 0.88 <0.01
97.17

21 Jun 47.01 0.71 8.23 8.82 25.61 0.15 7.78 0.85 <0.01
99.16
Average (wt%): 47.09 0.70 8.22 8.63 25.51 0.16 7.73 0.85 0.01

Preferred values (wt%): 49.08 0.72 7.89 8.67 24.59 0.15 7.55 0.84 <0.02

Standard deviation (wt%): 1.32 0.01 0.13 0.24 0.15 0.005 0.10 0.02 0.00

Precision (%): 2.80 1.43 1.58 2.78 0.59 3.13 1.29 2.35


Accuracy (%): –4.23 –2.86 4.01 –0.46 3.61 6.25 2.33 1.18


JP-1 15 May 44.76 <0.01 0.59 8.50 45.69 0.12 0.55 <0.03 <0.01
100.21

30 May 44.48 <0.01 0.68 8.46 46.86 0.12 0.62 0.03 0.01
101.26

30 May 44.32 <0.01 0.69 8.65 47.30 0.12 0.64 0.03 0.01
101.76

1 Jun 43.66 <0.01 0.54 8.14 46.33 0.12 0.47 <0.03 <0.01
99.27

1 Jun 43.12 <0.01 0.55 8.15 45.66 0.12 0.46 <0.03 <0.01
98.06

4 Jun 43.70 0.01 0.63 8.31 46.83 0.12 0.57 0.03 <0.01
100.20

4 Jun 41.98 0.01 0.82 8.43 44.38 0.12 0.59 0.03 0.01
96.37

7 Jun 43.68 0.01 0.67 8.54 45.91 0.12 0.58 0.03 0.01
99.55

7 Jun 44.47 0.01 0.65 8.59 45.11 0.12 0.60 <0.03 0.01
99.56

9 Jun 44.41 0.01 0.67 8.62 46.35 0.12 0.59 <0.03 <0.01
100.77

9 Jun 42.55 0.01 0.67 8.37 44.79 0.12 0.60 <0.03 <0.01
97.11

13 Jun 44.23 0.01 0.66 8.15 44.39 0.12 0.62 <0.03 0.01
98.18

13 Jun 43.62 0.01 0.66 8.58 46.28 0.12 0.59 <0.03 <0.01
99.86

14 Jun 41.87 0.02 0.65 8.03 44.89 0.11 0.59 <0.03 0.01
96.16

14 Jun 41.92 0.01 0.66 8.03 46.05 0.12 0.58 0.03 <0.01
97.40

21 Jun 43.21 0.01 0.66 8.69 46.12 0.12 0.63 0.03 0.01
99.47

21 Jun 42.81 0.01 0.66 8.49 45.85 0.12 0.62 <0.03 <0.01
98.56
Average (wt%): 43.46 0.01 0.65 8.40 45.81 0.12 0.58 0.03 0.01

Preferred values (wt%): 42.39
0.62 8.34 44.72 0.12 0.56 0.02 <0.01

Standard deviation (wt%): 0.96 0.003 0.06 0.22 0.86 0.002 0.05 0.01 0.00

Precision (%): 2.21 30.00 9.23 2.62 1.88 1.67 8.62 63.14


Accuracy (%): 2.46
4.62 0.71 2.38
3.45 33.33


DTS-1 26 May 36.17 <0.01 0.20 7.92 43.70 0.11 0.09 <0.03 <0.01
88.19†

30 May 41.08 <0.01 0.20 8.66 50.43 0.12 0.15 <0.03 <0.01
100.64

30 May 39.77 <0.01 0.19 8.38 48.64 0.12 0.14 <0.03 <0.01
97.24

1 Jun 40.14 <0.01 0.06 8.21 48.74 0.11 0.01 <0.03 <0.01
97.27

1 Jun 40.67 <0.01 0.06 8.42 50.33 0.12 0.01 <0.03 0.01
99.62

4 Jun 40.00 0.01 0.14 8.50 49.00 0.12 0.13 <0.03 <0.01
97.90

4 Jun 40.06 0.01 0.14 8.58 48.59 0.12 0.12 <0.03 <0.01
97.62

7 Jun 39.21 0.01 0.17 8.33 49.22 0.12 0.10 <0.03 <0.01
97.16

7 Jun 40.15 0.01 0.17 8.51 48.37 0.12 0.11 <0.03 <0.01
97.44

9 Jun 40.59 0.01 0.16 8.66 49.60 0.12 0.12 <0.03 <0.01
99.26

9 Jun 40.74 0.01 0.17 8.62 48.05 0.12 0.12 <0.03 <0.01
97.83

13 Jun 39.89 0.01 0.17 8.57 48.44 0.12 0.12 <0.03 <0.01
97.32

13 Jun 39.87 0.01 0.16 8.66 49.56 0.12 0.11 <0.03 <0.01
98.49

14 Jun 39.86 0.02 0.17 8.26 48.31 0.11 0.14 0.03 0.01
96.91

14 Jun 39.73 0.01 0.16 8.23 49.47 0.11 0.15 <0.03 0.01
97.87

21 Jun 40.56 0.01 0.17 8.48 48.04 0.12 0.09 <0.03 <0.01
97.47

21 Jun 40.41 0.01 0.18 8.46 48.77 0.12 0.09 <0.03 <0.01
98.04
Average (wt%): 40.17 0.01 0.15 8.47 48.97 0.12 0.11 0.03 0.01

Preferred values (wt%): 40.41 0.01 0.19 8.68 49.59 0.12 0.17 0.02 0.001

Standard deviation (wt%): 0.47
0.04 0.15 0.74
0.04



Precision (%): 1.17
26.67 1.77 1.51
36.36



Accuracy (%): –0.59
–21.05 –2.42 –1.25
–35.29 50.00















 
Standard
Date
(2003)
Trace element (ppm)
Cr
Ni
Ba
Sr
V
Y
Zr
Sc
Co
Cu












ROA-3* 15 May 1838 1283 90 38 134

28 68 42

15 May 1876 1424 31 35 140

29 69 43

26 May 2032 1292 7 36 178 14 27 27 55 53

30 May 1901 1145 –3 37 183 13 40 29 70 50

30 May 1875 1140 –2 37 181 13 43 29 68 49

1 Jun 1952 1169 –1 36 185 14 40 28 72 48

4 Jun 1921 1206 28 39 185 14 41 30 72 53

7 Jun 1906 1147 4 36 190 14 39 29 68 55

9 Jun 1803 1036 –4 37 180 14 40 29 50 51

13 Jun 1893 1262 –11 40 179 15 38 28 53 51

14 Jun 1751 1100 –12 38 187 14 40 28 91 56

21 Jun 1844 1124 –5 38 181 14 40 29 71 52
Average (wt%): 1883 1194 10 37 175 14 39 29 67 50
Preferred values (wt%): 1901 1171 1.2 36 192 13 35 28 71 66
Standard deviation (wt%): 72 105 29 1 18 1 4 1 11 4
Precision (%): 3.82 8.79 290.00 2.70 10.29 7.14 10.26 3.45 16.42 8.00
Accuracy (%): –0.96 1.93 88.00 2.70 –9.71 7.14 10.26 3.45 –5.97 –32
JP-1 15 May 2984 2326 5 0 25

7 107 11

30 May 3005 2371 12 1 26 1 7 7 115 18

30 May 3013 2542 15 1 25 0 7 7 111 18

1 Jun 3080 2449 –13 0 24 0 8 7 114 18

1 Jun 2910 2220 19 0 26 0 7 7 114 18

4 Jun 2980 2442 13 2 25 –1 8 7 110 18

4 Jun 3006 2545 11 3 26 0 7 7 113 18

7 Jun 3130 2521 26 2 27 0 6 7 107 17

7 Jun 2945 2461 15 2 25 0 7 7 117 17

9 Jun 3017 2411 23 1 25 0 7 7 115 18

9 Jun 3121 2340 4 0 26 –1 7 7 134 18

13 Jun 3102 2595 0 3 25 1 7 7 110 18

13 Jun 3055 2437 –1 3 29 1 7 7 101 18

14 Jun 2926 2366 15 2 26 0 6 7 85 17

14 Jun 2866 3058 –9 1 26 0 7 7 67 17

21 Jun 3013 2427 6 2 27 0 8 7 108 18

21 Jun 2983 2548 18 1 26 0 7 7 114 18
Average (wt%): 3008 2474 9 1 26 0 7 7 108 17
Preferred values (wt%): 2970 2460 17
29
6.30 7.07 116 49.1
Standard deviation (wt%): 73 178 11 1 1 0.4 0.6 0.0 14 2
Precision (%): 2.46 7.19 116.08
3.85 689.63 8.57
12.96 11.76
Accuracy (%): 1.26 0.57 –88.89
–11.54
10.00 –1 –7.41 –188.82












DTS-1 26 May 3984 2358 –7 1 0 0 6 3 87 22

30 May 3979 2244 6 1 12 0 1 3 134 18

30 May 3939 2479 7 1 11 0 4 3 134 18

1 Jun 3889 2314 55 1 7 0 0 3 127 18

1 Jun 3998 2293 7 0 8 0 3 3 133 18

4 Jun 3978 2310 6 1 9 0 2 3 127 18

4 Jun 3967 2337 4 1 8 0 3 3 135 18

7 Jun 4016 2256 –3 1 12 0 3 3 123 17

7 Jun 3863 2392 –12 2 10 0 2 3 134 17

9 Jun 3957 2383 –6 0 9 1 2 3 133 18

9 Jun 4058 2266 –6 0 7 0 3 4 179 18

13 Jun 3888 2197 30 –2 10 0 3 3 137 18

13 Jun 4100 2659 –13 2 8 2 2 3 117 18

14 Jun 3810 2279 55 –1 10 –1 3 3 84 17

14 Jun 3645 2449 2 –3 10 –1 3 3 114 17

21 Jun 4023 2299 –1 –4 11 –1 2 3 130 18

21 Jun 3916 2362 17 –3 12 –1 1 3 130 18
Average (wt%): 3942 2346 8 0 9 0 3 3 127 18
Preferred values (wt%): 3990 2360 1.70 0.32 11 0.04 4 3.5 137 7.1
Standard deviation (wt%): 105 109 21 2 3 1 1

1
Precision (%): 2.66 4.65 262.50
33.33
33.33

5.56
Accuracy (%): –1.2 –0.59 370.59
–18.18
–25 –14.29 –7.3 153.52

 

Standard
Date
(2003)
Major element oxide (wt%)
SiO2
TiO2
Al2O3
Fe2O3
MgO
MnO
CaO
Na2O
K2O
P2O5
Total













147-895D-10W 15 May 43.92 0.35 3.41 9.86 36.05 0.13 3.52 0.45 0.07
97.76

15 May 45.19 0.40 3.65 9.82 36.07 0.13 3.69 0.49 0.04
99.48
Average (wt%): 44.56 0.38 3.53 9.84 36.06 0.13 3.61 0.47 0.06
98.64
Preferred values (wt%): 43.95 0.49 3.99 12.02 34.88 0.17 3.83 0.56 0.06 0.06 99.95
Standard deviation (wt%): 0.90 0.04 0.17 0.03 0.01
0.12 0.03 0.02

Precision (%): 2.02 10.53 4.82 0.30 0.03
3.32 6.38 33.33

Accuracy (%): 1.39 –22.45 –11.53 –18.14 3.38 –23.53 –5.74 –16.07


BIR-1* 26 May 49.32 0.93 15.01 11.87 9.53 0.17 13.10 1.75 0.03 0.07 101.78

26 May 48.46 1.01 16.28 11.48 9.65 0.17 13.37 1.93 0.03 0.06 102.44

30 May 48.00 0.94 15.59 11.34 10.06 0.18 13.31 1.80 0.02
101.24

1 Jun 47.84 0.93 15.68 11.42 9.81 0.17 13.41 1.81 0.02
101.09

4 Jun 47.20 0.96 15.31 11.45 9.52 0.17 13.19 1.79 0.02
99.61

7 Jun 47.38 0.94 15.67 11.18 9.63 0.17 12.93 1.79 0.02
99.71

9 Jun 46.59 0.93 15.53 11.07 9.51 0.18 13.25 1.82 0.04
98.92

13 Jun 46.85 0.94 15.32 11.37 9.63 0.17 12.74 1.87 0.02
98.91

14 Jun 45.57 0.92 15.64 10.94 9.91 0.17 13.01 1.83 0.02
98.01

21 Jun 47.67 0.94 15.57 11.20 9.66 0.17 13.09 1.82 0.03
100.15
Average (wt%): 48.59 0.96 15.63 11.56 9.75 0.17 13.26 1.83 0.03 0.07
Preferred values (wt%): 47.96 0.96 15.50 11.30 9.70 0.18 13.30 1.82 0.03 0.02
Standard deviation (wt%): 0.67 0.04 0.64 0.27 0.28 0.01 0.14 0.09 0.01 0.007
Precision (%): 1.38 4.17 4.09 2.34 2.87 5.88 1.06 4.92 33.33 10.00
Accuracy (%): 1.31
0.84 2.30 0.52 –5.56 –0.3 0.55
250.00
BHVO-2 15 May 49.86 2.73 13.20 12.26 7.04 0.17 11.29 2.21 0.52
99.28

26 May 49.81 2.73 13.33 11.97 6.96 0.17 10.90 2.20 0.52 0.25 98.84

30 May 50.27 2.73 13.45 12.22 7.38 0.17 11.48 2.24 0.52
100.46

1 Jun 50.16 2.73 13.52 12.28 7.30 0.17 11.48 2.26 0.52
100.42

4 Jun 49.92 2.74 13.44 12.48 7.25 0.17 11.51 2.23 0.52
100.26

7 Jun 49.38 2.73 13.40 12.31 7.38 0.17 11.42 2.22 0.52
99.53

9 Jun 49.15 2.73 13.45 12.31 7.21 0.17 11.53 2.21 0.52
99.28

13 Jun 49.44 2.74 13.51 12.27 7.26 0.17 11.44 2.18 0.52
99.53

14 Jun 48.86 2.74 13.64 11.82 7.25 0.16 11.43 2.23 0.52
98.65

21 Jun 50.06 2.73 13.44 12.23 7.16 0.17 11.46 2.24 0.52
100.01
Average (wt%): 49.69 2.73 13.44 12.22 7.22 0.17 11.39 2.22 0.52 0.25
Preferred values (wt%): 49.90 2.73 13.50 12.30 7.23 0.17 11.40 2.22 0.52 0.27
Standard deviation (wt%): 0.46 0.005 0.12 0.19 0.14 0.003 0.19 0.02 0.00

Precision (%): 0.93 0.18 0.89 1.55 1.94 1.76 1.67 0.90


Accuracy (%): –0.42
–0.44 –0.65 –0.14
–0.09

–7.41
 
Standard
Date
(2003)
Trace element (ppm)
Cr
Ni
Ba
Sr
V
Y
Zr
Sc
Co
Cu
147-895D-10W 15 May 2415 2846 33 236 89

16 98 26

15 May 2234 2393 -9 256 101

16 94 28
Average (wt%): 2325 2620 12 246 95



27
Preferred values (wt%): 2162 1635 10 184 160

15 86 30
Standard deviation (wt%): 128 320 29 14 8



1
Precision (%): 5.51 12.21 246.95 5.69 8.42



3.70
Accuracy (%): 7.54 60.24 18.41 33.70 –40.63



–10
BIR-1* 26 May 384 181 62 107 308 16 11 43 45 65

26 May 452 195 1 110 325 17 10 46 47 69

30 May 387 203 17 108 314 11 18 44 53 61

1 Jun 370 174 –18 106 313 16 18 43 55 58

4 Jun 389 187 23 106 324 16 16 45 56 64

7 Jun 360 188 9 99 319 16 17 44 50 68

9 Jun 353 197 4 105 312 16 18 44 65 63

13 Jun 352 179 2 109 308 17 16 45 47 64

14 Jun 341 288 –11 107 311 15 16 44 47 70

21 Jun 364 172 1 108 319 16 15 45 54 63
Average (wt%): 408 193 27 108 316 15 13

65
Preferred values (wt%): 370 170 6 110 310 16 18 44 52 125
Standard deviation (wt%): 38 11 32 2 9 3 4

4
Precision (%): 9.31 5.70 118.52 1.85 2.85 20.00 30.77

6.15
Accuracy (%): 10.27 13.53 350.00 –1.82 1.94 –6.25 –27.78

1.94
BHVO-2 15 May 290 79 130 389 320

31 62 133

26 May 284 122 169 390 26 130 311 31 51 148

30 May 271 142 130 390 312 26 172 31 58 148

1 Jun 278 114 115 390 310 26 172 32 59 148

4 Jun 279 116 130 391 315 26 172 32 62 148

7 Jun 267 132 129 391 305 26 172 32 64 149

9 Jun 254 230 127 389 314 26 172 32 63 149

13 Jun 262 150 123 390 312 26 172 32 58 148

14 Jun 268 195 95 391 314 25 172 31 68 166

21 Jun 270 117 130 390 311 26 172 32 63 148
Average (wt%): 272 140 128 390 284 37 187

149
Preferred values (wt%): 280 119 130 389 317 26 172 32 45 127
Standard deviation (wt%): 11 44 18 1 91 35 46

8
Precision (%): 4.04 31.43 14.06 0.26 32.04 94.59 24.60

5.37
Accuracy (%): –2.86 17.65 –1.54 0.26 –10.41 42.31 8.72

17.32

Notes: * = run as an unknown. † = due to bad data quality, this value (May 26) was not included in the average. All elements were analyzed at 4000-fold dilution. The obtained values were compared to values for international reference rocks and laboratory standards to assess accuracy and precision. Preferred values are from Puchelt et al. (1996) for Sample 147-895D-10W, Remaοdi (1993) for ROA-3, Govindaraju (1994) for JP-1, and USGS (2003) for U.S. Geological Survey Reference Materials DTS-1, BIR-1, and BHVO-2. NA = not applicable (no preferred value reported). This table is also available in ASCII.