ALS offers methods suitable for a range of industrial minerals including, but not limited to, graphite, bauxite, rare earth elements, magnesite, ilmenite/rutile, limestone/dolomite, clays, potash, lithium, boron, phosphates, zircon, talc, soda ash, fluorspar, silica and feldspar. For industrial minerals, the choice of analytical method will depend on several factors; resistivity of the minerals to decomposition, the expected concentration of the elements of interest and requirements with regards to concentration of other elements that may be considered deleterious. Many industrial minerals have distinct chemical and physical properties, but this can also mean that they require specific digestion and analysis procedures.
ALS uses low chrome steel as standard equipment for sample pulverisation. When preparing geological samples, the equipment used will impart traces of the elements from the equipment to the sample. If any of the elements of interest for your product are present in low chromium steel (eg: Cr, Fe, Mn, Mo, Ni, V and Co), alternative preparation equipment is available.
Options for pulverising bowls include carbon steel, zirconium, tungsten carbide and agate. Please contact the laboratory to which you will be submitting your samples, to ensure they have the required equipment available to prepare your samples.
Phosphate ores are typically sedimentary marine phosphorites, apatite-rich igneous rocks, or guano. These variable ores can host other minerals that may be of economic importance (REEs) or deleterious (e.g., those with Si, Fe or F).
ALS offers a fusion-XRF method for phosphate ore analysis, including loss on ignition. The analytes reported routinely by this method are Al2O3 , CaO, Fe2O3 , K2O, MgO, MnO2 , Na2O, P2O5 , SiO2 and TiO2 , but fluorine and several other elements can be reported if required.
|Code||Analytes & Ranges (%)||Description|
|Al2O3||0.01-100||K2O||0.01-10||Na2O||0.01-11||TiO2||0.01-30||Fused disc XRF.|
|Loss on Ignition
|Furnace or Thermogravimetric Analyser (TGA).|
Chromite is one of the minerals that is highly resistant to acid digestion, including aggressive four-acid digestion, therefore fusion decomposition is required.
Method ME-XRF26s is designed for ores of chromite and manganese with less than 5% sulphides. If the sulphide content of samples is >5 %, alternative methods utilising sodium peroxide, or the addition of an oxidising agent are recommended (ME-ICP81, ME-XRF15b and ME-XRF15c).HTML
|ME_XRF26||Cementitious Materials||Al2O3, CaO, Fe2O3, K2O, LOI, MgO, MnO, Na2O,
SiO2, SO3, TiO2 and LOI
|ME_XRF26s||Chromite and Manganese Ore||Al2O3, BaO, CaO, Cr2o3 Fe2O3, K2O, MgO, MnO,
Na2O, P2O5, SO3, SiO2, TiO2 and LOI
Potash ore typically contains potassium chloride, sodium chloride, along with other salts, and clays. The identification of the water leachable components i.e. potassium and sodium chloride is a key part of any analysis.
ALS offers a package (ME-POTPKG) designed for potash exploration to report total chemical composition of samples as well as the water-leachable proportion of analytes. ME-XRF26k is a fusion-XRF method that reports total content, where ME-ICP03k is a water-leach method that reports soluble elements. OA-GRA04k provides the percentage of residue insoluble in water using a gravimetric method.
|Code||Analytes & Ranges (%)|
|ME-XRF26k||Ca||0.01 - 25||K||0.01 - 55||Na||0.01 - 42|
|Fe||0.01 - 50||Mg||0.01 - 25||S||0.01 - 30|
If you don’t see the commodity you are interested in mentioned on the web page or listed in our fee schedule, please contact ALS client services. ALS offers many more methods than are listed our fee schedule or described on this web page.
Analysing samples for exploration and resource definition requires a variety of methods depending on the sample matrix.MORE INFORMATION