Document Actions
Fire Assay Glossary
| Sections |
|---|
| Procedures |
| LIMS |
Definitions specific to Geology LIMS
Procedures
-
AA · atomic absorption spectrometry
#
- instrumental method of determining element concentration by aspirating a sample solution into an acetylene or nitrous-oxide flame and passing light from the same element through the flame.The concentration of the element in the sample can be quantified by the amount of light absorbed by the element present within by the flame. www.acmelab.com
-
Alamine
#
- alamine is used for uranium recovery from sulfuric acid leach liquors and will also recover uranium from sulfuric acid resin eluate solutions. Different forms of alamine are also used for cobalt extraction, reprocessing of spent catalysts and the recovery and purification of rare earth and noble metals. www.cognis.com. Also see 'amine' here at www.bikalabs.com
-
Aliquat 336
#
- also known as methyltrioctylammonium chloride and tricaprylylmethylammonium chloride, is a quaternary ammonium salt and phase transfer catalyst. A PTC is a type of chemical compound which facilitates the migration of a particular chemical component in one phase into another phase in a heterogeneous system. The chemical component is soluble in one phase but insoluble in the other unless the phase transfer catalyst is present. For example the nucleophilic aliphatic substitution reaction of an aqueous sodium cyanide solution with the alkyl halide 1-bromobutane does not ordinarily take place because both solutions will not mix. By the addition of 1% of the quaternary ammonium salt tetrahexylammonium chloride however cyanide ions are ferried into the organic phase from the water phase and 1-cyanobutane forms quantitatively in a matter of minutes. A PTC works by encapsulating the ion. The PTC-ion system has a hydrophilic interior containing the ion and a hydrophobic exterior. See solvent extraction. en.wikipedia.org
-
Amine
#
- An organic molecule which consists of an ammonia molecule where one or more of the hydrogen atoms has been replaced by organic groups. misterguch.brinkster.net
-
Assay
#
- i) A method to analyze or quantify a substance in a sample. An assay is an analysis done to determine: The presence of a substance and the amount of that substance, The biological or pharmacological potency of a drug, www.als.net. ii) A chemical test performed on a sample of ores or minerals to determine the amount of valuable metals contained, www.miningbasics.com
-
CIP
#
- a process used to recover gold that has been dissolved after cyanide leach agitation. Pulp, after cyanidation, is mixed in a series of agitators with coarse activated carbon particles. Carbon is moved counter-current to the pulp, absorbing gold as it passes through the circuit. Loaded carbon is removed by screening from the lead agitated tank. Gold is recovered from the loaded carbon by stripping at elevated temperature and pressure in a caustic cyanide solution. www.placerdome.com
-
Cupelation
#
- involves adding lead to the sample, the easily oxidisable lead takes away most of the base impurities. www.sciencemadness.org
-
Eluate
#
- a liquid solution that results from elution. wordnet.princeton.edu
-
Elution
#
- the process of extracting one material from another by washing with a solvent to remove adsorbed material from an adsorbent - as in washing of loaded ion-exchange resins to remove captured ions; used to obtain uranium ions. wordnet.princeton.edu
-
Fire Assay - Gold
#
- an assay method using fire assay fluxes to decompose the sample and collect Au. After cupelation to produce a prill, Au is parted nitric acid digestion. The remaining Au flake may be weighed - gravimetric determination - or dissolved in Aqua Regia for determination by AAS or ICP. This is the most suitable method for determination of ore-grade concentrations of Au in rocks and drill core. www.acmelab.com
-
Flux
#
- a chemical substance that reacts with gangue minerals to form slags, which are liquid at furnace temperature and low enough in density to float on the molten bath of metal or matte. www.miningbasics.com
-
Fluxing
#
- A process used in the heating of metals which may be intended to reduce or eliminate oxidation, confine the products of oxidation, reduce their melting point, and improve fluidity of surface metal layers. Fluxing is generally used in casting, welding, and soldering. www.wmrc.uiuc.edu
-
Leach
#
- To dissolve from a rock. For example, when acidic water passes through fractured rocks, soluble minerals leach, or dissolve, from the rocks. college.hmco.com
-
PGE · Platinum Group Elements
#
- includes platinum (Pt), palladium (Pd), rhodium (Rh), iridium (Ir), ruthenium (Ru) and osmium (Os) www.acmelab.com
-
PGM · Platinum Group Metals
#
- Platinum group metals are the metals derived from PGE - Platinum Group Elements. www.implats.co.za
-
Prills
#
- small pieces of pure precious metal extracted from assay samples. Usually resembling a cone shape in appearance. www.cooksongold.com
-
Solvent extraction
#
- also known as liquid-liquid extraction, and partitioning, is a method to separate compounds based on their solution preferences for two different immiscible liquids, usually water and an organic solvent. It is an extraction of a substance from one liquid phase into another liquid phase. Liquid-liquid extraction is a basic technique in chemical laboratories, where it is done in separating funnels, as well as a common process in chemical industry and ore processing. en.wikipedia.org
-
Tailings
#
- Tailings, also called gangue, are the rejected material from mining and screening operations. Tailings are the uneconomic remainders from mining; as mining techniques and the price of minerals improve it is not unusual for tailings to be reprocessed using new methods or more thoroughly with old methods, perhaps to recover minerals other than those originally mined. en.wikipedia.org
LIMS
-
AA · atomic absorption spectrometry
#
- instrumental method of determining element concentration by aspirating a sample solution into an acetylene or nitrous-oxide flame and passing light from the same element through the flame.The concentration of the element in the sample can be quantified by the amount of light absorbed by the element present within by the flame. www.acmelab.com
Press Release: Bika LIMS 2.1 Inkosi open source release
