Geochemistry Guide 2025

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Multi-acid (four acid) digestion packages

ADDITIONAL SINGLE ANALYTES CODE(S)

ANALYTES

LIMITS

DESCRIPTION Gravimetric

MIN. SAMPLEWT.(g)

GO_ICP42C100 MULTI-ACID DIGESTION PACKAGE / ICP-OES OR GO_ICP46C100 MULTI-ACID DIGESTION PACKAGE / FUSION / ICP-OES ELEMENTS AND REPORTING LIMIT(S) Ag ≥ 2 ppm Co ≥ 4 ppm Mo ≥ 5 ppm Sr ≥ 1 ppm Al* ≥ 100 ppm Cr* ≥ 10 ppm Na ≥ 100 ppm Ti* ≥ 5 ppm As* ≥ 30 ppm Cu ≥ 5 ppm Ni ≥ 20 ppm Tl ≥ 30 ppm Ba* ≥ 2 ppm Fe ≥ 100 ppm P ≥ 30 ppm V ≥ 2 ppm Be ≥ 0.05 ppm K* ≥ 20 ppm Pb ≥ 20 ppm Y ≥ 0.5 ppm Bi ≥ 20 ppm Li ≥ 10 ppm Sb* ≥ 10 ppm Zn ≥ 10 ppm Ca* ≥ 100 ppm Mg* ≥ 40 ppm Se ≥ 30 ppm Cd ≥ 2 ppm Mn ≥ 5 ppm Sn* ≥ 20 ppm Additional elements can be added. An ICP-MS option may be available locally. * Recovery can be incomplete so analysis can be biased low.

≥ 0.05%

GC_CLA04V GC_CLA03V GC_CVA38B50

Insolubles (acid)

1 2

≥ 5%

CaO

Available lime Cold vapour AAS

≥ 0.3 ppm

Hg

0.25

GC_ISE10V

pH (soils/sediments)

0.1 - 14

Ion selective electrode

20

SGS can analyze a number of individual ore-grade elements.

VOLUMETRIC AND GRAVIMETRIC METHODS FOR CONCENTRATES CODE(S) ELEMENT

MIN. SAMPLE WT.(g)

LIMIT(S) 15 - 60% 5 - 95% 5 - 95% 10 - 80% 10 - 80% 10 - 95%

DESCRIPTION

GC_CON13V GC_CON03V GC_CON07V GC_CON11V GC_CON12V GC_CON08V

Cu Cu

Titration

0.25

Electroplating Electroplating

1.0 1.0 2.0 0.5

Ni

Pb Zn

Titration Titration Titration

Fe 0.25 These elements can be analyzed to party or umpire quality standards (GT). Additional elements can be determined on concentrate samples in some SGS laboratories. Please enquire. Trade sample analyzes typically require moisture analysis and may require a larger minimum sample weight.

Fusion packages

GC_ICP93A50V FUSION / ICP-OES PACKAGE ELEMENTS AND REPORTING LIMIT(S) Ag > 200 ppm - 0.1%

Process solution packages

Co > 200 ppm Cr > 200 ppm Cu > 40 ppm Fe > 0.05%

Mn > 0.002% Mo > 300 ppm Ni > 300 ppm Pb > 800 ppm Sb > 400 ppm Se > 2,000 pm Sn > 800 ppm

Sr > 10 ppm Ti > 0.02%

Al > 0.04%

GC_ICP84T PROCESS SOLUTION PACKAGE / ICP-OES / NON-CYANIDE BASED ELEMENTS AND REPORTING LIMIT(S) Ag ≥ 0.08 ppm Co ≥ 0.3 ppm

As > 1,200 ppm Ba > 3 ppm Be > 3 ppm Bi > 400 ppm Cd > 40 ppm

Tl > 2,000 ppm V > 80 ppm Y > 8 ppm Zn > 300 ppm

K > 0.04%

Mo ≥ 0.1 ppm Na ≥ 2 ppm Ni ≥ 0.5 ppm

Sr ≥ 0.002 ppm Ti ≥ 0.02 ppm Tl ≥ 3 ppm V ≥ 0.2 ppm Y ≥ 0.02 ppm Zn ≥ 0.5 ppm

Li > 800 ppm Mg > 0.003%

Al ≥ 0.2 ppm As ≥ 0.5 ppm Ba ≥ 0.007 ppm Be ≥ 0.002 ppm

Cr ≥ 0.1 ppm Cu ≥ 0.1 ppm Fe ≥ 0.2 ppm

Additional elements can be added.

P ≥ 5 ppm

K ≥ 1 ppm

Pb ≥ 0.5 ppm Sb ≥ 1 ppm Se ≥ 1 ppm Sn ≥ 0.5ppm

GC_AAS93A50V FUSION / AAS ELEMENTS AND REPORTING LIMIT(S) Al ≥ 0.02%

Bi ≥ 1 ppm

Li ≥ 0.5 ppm

Ca ≥ 0.9 ppm Cd ≥ 0.05 ppm

Mg ≥ 0.07 ppm Mn ≥ 0.04 ppm

Fe ≥ 0.07 % Mg ≥ 0.005%

Ni : ≥ 0.01% Si ≥ 0.07% Sn ≥ 0.05%

Ti ≥ 0.05% V ≥ 0.1%

Cr ≥ 0.005% Cu ≥ 0.002%

Additional elements can be added. ICP-MS option may be available locally.

Mn ≥ 0.005% Zn ≥ 0.001% Additional elements can be added. An ICP-MS option is available. Concentrate samples containing greater than 50% of the target element can require alternative analytical methods.

GC_ICP82T PROCESS SOLUTION PACKAGE / ICP-OES / CYANIDE BASED ELEMENTS AND REPORTING LIMIT(S) Ag ≥ 0.08 ppm Co ≥ 0.3 ppm

Mo ≥ 0.6 ppm Na ≥ 2 ppm Ni ≥ 0.6 ppm

Sr ≥ 0.002 ppm Ti ≥ 0.02 ppm Tl ≥ 3 ppm V ≥ 0.2 ppm Y ≥ 0.02 ppm Zn ≥ 0.7 ppm

FUSION / XRF PROCESS CONTROL-GRADE PACKAGES CODE(S)

Al ≥ 0.2 ppm As ≥ 3 ppm

Cr ≥ 0.1 ppm Cu ≥ 0.1 ppm Fe ≥ 0.2 ppm

ELEMENTS / LIMIT(S)

DESCRIPTION

GC_XRF72

Same available range and elements as

Borate fusion / XRF

GO_XRF72, refer to ore grade analysis section

Ba ≥ 0.007 ppm Be ≥ 0.002 ppm

P ≥ 5 ppm Pb ≥ 2 ppm Sb ≥ 1 ppm Se ≥ 3 ppm Sn ≥ 2 ppm

GC_XRF70V

Same available range and elements as GO_XRF70V, refer to ore grade section

Pyrosulphate fusion / XRF

K ≥ 1 ppm Li ≥ 2 ppm

Bi ≥ 1 ppm

Ca ≥ 0.9 ppm Cd ≥ 0.09 ppm

Mg ≥ 0.07 ppm Mn ≥ 0.04 ppm

Individual methods for process control-grade analysis

Additional elements can be added. ICP-MS option may be available locally.

SULPHUR AND CARBON CODE(S)

MIN. SAMPLE WT.(g)

ELEMENT

LIMIT(S) ≥ 0.01% ≥ 0.01% ≥ 0.01%

DESCRIPTION IR combustion

S C

0.1 - 0.3 0.1 - 0.3

GC_CSA06V

GC_CSA08V GC_CLA01V

S 2-

Leach/Digest/IR

2.0

Fe 2+ 0.25 Single elements can be determined by numerous decomposition techniques and finishes. Please contact your SGS customer service agent ≥ 0.2% Ferrous iron titration

48

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