Biogeochemistry
Mobile metal ion – SGS MMI soil geochemistry
SGS is the owner and sole provider of SGS MMI Technology. We have over 20 years of experience with this technology, and we are the market leaders in providing a weak extraction of the mobile form of the ions residing in near surface soils. SGS MMI is a world-renowned exploration tool repeatedly proven to find buried mineral deposits. SGS MMI Technology is an innovative analytical process that uses a unique analysis of metals in soils and weathered materials. Target elements are extracted using weak solutions of organic and inorganic compounds rather than conventional aggressive acid-based digests. SGS MMI solutions contain strong ligands, which detach and hold the metal ions that were loosely bound to soil particles by weak atomic forces. The extraction does not dissolve the bound forms of metal ions. Thus, metal ions in MMI solutions are the chemically active or ‘mobile’ component of the sample. Because these mobile, loosely bound complexes are in very low concentrations, elemental determinations are made by conventional or cell-based ICP-MS. There are many benefits to using SGS MMI Technology for soil geochemistry, including:
SGS has considerable experience in the preparation and analysis of a wide range of vegetation samples. Such samples may be dried and macerated or ashed prior to acid digestion and analysis by ICP-OES (GE_ICP23D50) and ICP-MS (GE_IMS23D50).
GE_ICP23D50 AI
12 - 150,000 ppm 10 - 10,000 ppm 1 - 10,000 ppm
K
7 - 250,000 ppm 0.2 - 50,000 ppm 9 - 150,000 ppm 2 - 10,000 ppm 12 - 150,000 ppm 1 - 10,000 ppm 18 - 250,000 ppm
S
42 - 410,000 ppm 0.5 - 10,000 ppm 1 - 150,000 ppm 20 - 10,000 ppm
B
Li
Sr
Ba
Mg Mn
Ti
Ca 30 - 150,000 ppm
V
Cr
10 - 10,000 ppm 0.5 - 10,000 ppm 7 - 150,000 ppm
Na
Zn 1 - 10,000 ppm
Cu Fe
Ni
Zr
0.05 - 10,000 ppm
P
GE_IMS23D50 Ag
• Few false anomalies • Focused anomalies • Minimal nugget effects
0.01 - 10 ppm
Ho
0.002 - 500 ppm 0.005 - 500 ppm 0.002 - 500 ppm 0.01 - 10,000 ppm 0.002 - 10,000 ppm
Se 5 - 1,000 ppm
As 10 - 10,000 ppm
In
Sm 0.005 - 1,000 ppm
Au
0.005 - 5 ppm
Ir
Sn Ta Tb Te Th
0.4 - 1,000 ppm 0.2 - 10,000 ppm 0.002 - 10,000 ppm
Bi
0.005 - 10,000 ppm 0.03 - 10,000 ppm 0.01 - 1,000 ppm 0.01 - 10,000 ppm 0.005 - 1,000 ppm
La Lu
Cd Ce Co Cs
MMI sample collection Sample collection is the critical part of a soil geochemistry program. The SGS MMI Technology has specific sampling protocols based on years of experience and research. In the absence of an orientation survey, samples must be taken at a constant depth (10-25 cm) below the organic-inorganic soil interface. There is no sample preparation or drying. The analysis is performed on a 50g sample and the extracted solution is analyzed via ICP-MS. For detailed instructions, please contact your SGS customer service agent.
Mo 0.05 - 10,000 ppm Nd 0.02 - 10,000 ppm
0.1 - 1,00 ppm
0.002 - 10,000 ppm 0.002 - 1,000 ppm
Pb Pd
0.5 - 10,000 ppm 0.01 - 500 ppm 0.005 - 1,000 ppm 0.005 - 350 ppm 0.2 - 10,000 ppm 0.001 - 500 ppm 0.04 - 10,000 ppm
TI
Dy 0.005 - 1,000 ppm
Tm 0.002 - 1,000 ppm U 0.001 - 10,000 ppm W 0.01 - 10,000 ppm Y 0.01 - 10,000 ppm Yb 0.002 - 100 ppm
Er
0.005 - 1,000 ppm
Pr Pt
Eu 0.002 - 1,000 ppm Ga 1 - 10,000 ppm
Rb Rh Sb Sc
Gd
0.01 - 1,000 ppm
Hf
0.5 - 500 ppm
GE_MMIM MOBILE METAL ION STANDARD PACKAGE / ICP-MS Ag ≥ 0.5 ppb Gd ≥ 0.5 ppb
Hg 0.3 - 10,000 ppm Vegetation sample preparation: Dry and macerate sample (G_DRY_KG, VEG10_WT)) or ash at 475 o C (G_PRP, PRP_ASH). 0.02 - 10,000 ppm
Sb Sc
≥ 0.5 ppb
AI
≥ 1 ppm ≥ 10 ppb ≥ 0.1 ppb ≥ 10 ppb ≥ 0.5 ppb ≥ 2 ppm
Hg
≥ 1 ppb
≥ 1 ppb
As Au Ba
In
≥ 0.1 ppb ≥ 0.5 ppm
Sm ≥ 1 ppb
K
Sn Sr Ta Tb Te Th Ti TI U W
≥ 1 ppb ≥ 10 ppb ≥ 1 ppb ≥ 0.1 ppb ≥ 10 ppb ≥ 0.5 ppb ≥ 10 ppb ≥ 0.1 ppb ≥ 0.5 ppb ≥ 0.5 ppb
La
≥ 1 ppb ≥ 1 ppb
Bi
Li
Ca Cd Ce Co Cr Cs Cu Dy
Mg Mn Mo Nb Nd
≥ 0.5 ppm ≥ 100 ppb
≥ 1 ppb ≥ 2 ppb ≥ 1 ppb
≥ 2 ppb
≥ 0.5 ppb
≥ 100 ppb ≥ 0.2 ppb ≥ 10 ppb ≥ 0.5 ppb ≥ 0.2 ppb ≥ 0.2 ppb ≥ 1 ppm ≥ 0.5 ppb
≥ 1 ppb ≥ 5 ppb
Ni
P
≥ 0.1 ppm
Pb Pd
≥ 5 ppb ≥ 1 ppb
Y
≥ 1 ppb
Er
Yb Zn
≥ 0.2 ppb ≥ 10 ppb
Eu Fe
Pr Pt
≥ 0.5 ppb ≥ 0.1 ppb
Zr
≥ 2 ppb
Ga ≥ 1 ppb Lower detection limit for Cr ( ≥ 1ppb) and addition of V ( ≥ 1ppb) are available under scheme code GE_MMIME. Additional elements such as S, B, Br, I, and Pb isotopes can also be measured upon request. Rb
26
27
Made with FlippingBook Annual report maker