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Standard Test Method for Analysis of Ores, Minerals, and Rocks by the Fire Assay Preconcentration Optical Emission Spectroscopy
Automatische name übersetzung:
Standard Test Method for Analyse von Erzen, Mineralien und Gesteine durch die Feuerprobe Anreicherung Optische Emissionsspektroskopie
NORM herausgegeben am 10.5.2002
Bezeichnung normen: ASTM E400-97
Anmerkung: UNGÜLTIG
Ausgabedatum normen: 10.5.2002
SKU: NS-46682
Zahl der Seiten: 6
Gewicht ca.: 18 g (0.04 Pfund)
Land: Amerikanische technische Norm
Kategorie: Technische Normen ASTM
Keywords:
analysis, fire assay, minerals, ores, precious metals, rocks, spectrographic, ICS Number Code 73.060.99 (Other metalliferrous minerals)
1. Scope | |||||||||||||
1.1 This test method covers the spectrographic analysis of ores, minerals, and rocks for silver, palladium, platinum, gold and rhodium. The concentrations of precious metals which can be determined in the material being analyzed depend on the amount of sample assayed (Note 1). Concentration ranges for the lead fire assay beads are as follows:
Note 1—The amounts used are large enough to minimize weighing errors. A wide range of precious metal concentrations in rocks, minerals and ores can be covered by a modest range of percentages in the lead beads by regulating the weights of the initial sample and the lead bead. Also, both gold and silver can be determined in the lead bead. When either of these metals is used as a collector for the others in the assay, as is generally done, it cannot be determined without another assay. 1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.Specific hazard statements are given in Section 9. |
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