44 / 172
Author Response to Reviewers 071506_OMAMAN-28-AOAC 2006.03_rev 071816
NIST SRM 695
Magruder 2009-06
Element
Certified
Mean
Recovery, % Bias
Concensus,
ICP
Mean
Recovery,
%
Bias
As,
mg/kg
200 ± 5
199.9
100.0
0.1
330.58 ± 20.55 358.45
108.43
27.87
Cd,
mg/kg
16.9 ± 0.2
17.1
111.2
0.2
343.55 ± 19.70 348.14
101.33
4.59
Co,
mg/kg
65.3 ± 2.4
61.7
103.9
3.6
945.97 ± 53.68 959.33
101.41
13.36
Cr,
mg/kg
244 ± 6
226.4
92.8
17.6 111.68 ± 11.16 127.93
114.55
16.25
Mo,
mg/kg
20.0 ± 0.3
19.5
107.3
0.5
17.80 ± 2.70
18.10
101.66
0.30
Ni,
mg/kg
135 ± 2
127.6
94.5
7.4
1135.8 ± 81.32 1117.33
98.37
18.47
Pb,
mg/kg
276 ± 17
284.9
103.2
8.9
3688.5 ±
1852.4
4869.59
132.02
1181.1
Se,
mg/kg
2.1 ± 0.1*
1.6
74.6
0.5
116.46 ± 8.33
110.56
94.93
5.90
Ca, %
2.26 ± 0.04
2.3
102.5
0.0
1.78 ± 0.12
1.79
100.43
0.01
Cu,
ppm
1225 ± 9
1214.4
99.1
10.6
334 ± 38
339.69
101.70
5.69
Fe, %
3.99 ± 0.08
4.0
99.7
0.0
2.03 ± 1.02
3.03
149.03
1.00
Mg, % 1.79 ± 0.05
1.8
98.2
0.0
0.18 ± .12
0.19
105.89
0.01
Mn, %
0.305 ±
0.005
0.3
101.9
0.0
0.153 ± 0.013
0.18
115.54
0.02
Zn, %
0.325 ±
0.005
0.3
97.7
0.0
0.165 ± 0.11
0.16
99.25
0.00
*Reference
Value
Table 6. Comparison of results of certified and consensus values with bias included.