| source | USGS Geochemical reference materials | |
| specification | MAG-1 is a fine grained gray-brown clayey mud with low carbonate content, from the Wilkinson Basin of the Gulf of Maine. The collection site was approximately 125 km east of Boston, Massachusetts. The age of the sediment is Holocene, but probably includes reworked Pleistocene sediment from sorrounding areas. | |
| Element concentrations were determined by cooperating laboratories using a variety of analytical methods. Certificate values are primarily based on international data compilations (Abbey, 1983, Gladney and Roelandts, 1988, Govindaraju, 1994). USGS reports (Flanagan, 1967, 1976) provide background information on this material. | ||
| comparison measurement with ICP-OES | ||
| Element | solid
concentration (revised March 1995) |
concentration
in digested sample (50 mg sample in 50 mL solution = 1 g/L) |
| Ag | 0.08 mg/kg | 0.08 ppb |
| As |
9.2 mg/kg |
9.2 ppb |
| Al | 86800 ± 1600 mg/kg (16.4±0.30% Al2O3) | 86.8 ± 1.6 ppm |
| Au |
0.0024 mg/kg |
2.4 ppt |
| B | 140 ± 6 mg/kg | 140 ± 6 ppb |
| Ba | 480 ± 41 mg/kg | 480 ± 41 ppb |
| Be | 3.2 ± 0.4 mg/kg | 3.2 ± 0.4 ppb |
| Bi | 0.34 mg/kg | 0.34 ppb |
| Br | 250 mg/kg | 250 ppb |
| C_total |
21500 mg/kg |
21.5 ppm |
| Ca |
9790 ± 710 mg/kg (1.37± 0.10% CaO) |
9.79 ± 0. 71 ppm |
| Cd | 0.20 ± 0.03 mg/kg | 0.20 ± 0.03 ppb |
| Ce | 88 ± 9 mg/kg | 88 ± 9 ppb |
| Cl | 31000 ± 600 mg/kg | 31 ± 0.6 ppm |
| Co | 20 ± 1.6 mg/kg | 20 ± 1.6 ppb |
| Cr | 97 ± 8 mg/kg | 97 ± 8 ppb |
| Cs | 8.6 ± 0.7 mg/kg | 8.6 ± 0.7 ppb |
| Cu | 30 ± 3 mg/kg | 30 ± 3 ppb |
| Dy | 5.2 ± 0.3 mg/kg | 5.2 ± 0.3 ppb |
| Eu | 1.6 ± 0.14 mg/kg | 1.6 ± 0.14 ppb |
| Er |
3 mg/kg |
3 ppb |
| F | 770 ± 80 mg/kg | 770 ± 80 ppb |
| Fe | 47600 ± 4200 mg/kg (6.80 ± 0.6 % Fe2O3) | 47.6 ± 4.2 ppm |
| Ga |
20 ± 1.5 mg/kg |
20 ± 1.5 ppb |
| Gd |
5.8 ± 0.7 mg/kg |
5.8 ± 0.7 ppb |
| Hf |
3.7 ± 0.5 mg/kg |
3.7 ± 0.5 ppb |
| Hg |
0.02 mg/kg |
0.02 ppb |
| Ho |
1.0 ± 0.1mg/kg |
1.0 ± 0.1 ppb |
| I |
380 mg/kg |
380 ppb |
| K |
29500 ± 1400 mg/kg (3.55 ± 0.1 7% K2O) |
29.5 ± 1.4 ppm |
| La |
43 ± 4 mg/kg |
43 ± 4 ppb |
| Li |
79 ± 4 mg/kg |
79 ± 4 ppb |
| Lu |
0.4 ± 0.04 mg/kg |
0.4 ± 0.04 ppb |
| Mg |
18000 ± 600 mg/kg (3.00 ± 0.10 % MgO) |
18.0 ± 0.6 ppm |
| Mn |
760 ± 69 mg/kg (0.098 ± 0.009 % MnO) |
760 ± 69 ppb |
| Mo |
1.6 mg/kg |
1.6 ppb |
| Na |
28400 ± 820 mg/kg (3.83 ± 0.11 % Na2O) |
28.4 ± 0.82 ppm |
| Nb |
12 mg/kg |
12 ppb |
| Nd |
38 ± 5 mg/kg |
38 ± 5 ppb |
| Ni |
53 ± 8 mg/kg |
53 ± 8 ppb |
| P |
699 ± 92 mg/kg (0.16 ± 0.021 % P2O5) |
699 ± 92 ppb |
| Pb |
24 ± 3 mg/kg |
24 ± 3 ppb |
| Rb |
150 ± 6 mg/kg |
150 ± 6 ppb |
| S_total |
3900 mg/kg |
3.9 ppm |
| Sb |
0.96 ± 0.1mg/kg |
0.96 ± 0.1 ppb |
| Sc |
17 ± 1 mg/kg |
17 ± 1 ppb |
| Si |
235000 ± 4500 mg/kg (50.4 ± 0.96 % SiO2) |
235 ± 4.5 ppm |
| Sm |
7.5 ± 0.6 mg/kg |
7.5 ± 0.6 ppb |
| Sn |
3.6 mg/kg |
3.6 ppb |
| Sr |
150 ± 15 mg/kg |
150 ± 15 ppb |
| Ta |
1.1 mg/kg |
1.1 ppb |
| Tb |
0.96± 0.09 mg/kg |
0.96± 0.09 ppb |
| Th |
12 ± 1 mg/kg |
12 ± 1 ppb |
| Ti |
4500 ± 420 mg/kg (0.75 ± 0.07 % TiO2) |
4.5 ± 0.42 ppm |
| Tm |
0.43 mg/kg |
0.43 ppb |
| U |
2.7 ± 0.3 mg/kg |
2.7 ± 0.3 ppb |
| V |
140 ± 6 mg/kg |
140 ± 6 ppb |
| W |
1.4 mg/kg |
1.4 ppb |
| Y |
28 ± 3mg/kg |
28 ± 3 ppb |
| Yb |
2.6 ± 0.3 mg/kg |
2.6 ± 0.3 ppb |
| Zn |
130 ± 6 mg/kg |
130 ± 6 ppb |
| Zr |
130 ± 13 mg/kg |
130 ± 13 ppb |