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Significance and Use
5.1 This practice is primarily intended to be used for the correction of silver loss in the fire assay process. Silver assays are determined by fire assay for the purpose of metallurgical exchange between seller and buyer.
5.2 It is assumed that all who use this practice will be trained analysts capable of performing skillfully and safely. It is expected that work will be performed in a properly equipped laboratory under appropriate quality control practices such as those described in Guide E882.
1.1 This practice covers the determination of fire assay correction for silver, utilizing proof silver, ores, concentrates, and related metallurgical materials.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 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. (See Test Methods E1335, Practices E50, Guide E882, and ISO Guide 35: 1989.)
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Other DocumentsISO 10378: 1994 Copper Sulfide Concentrates-Determination of Gold and Silver Contents-Fire Assay Gravimetric and Atomic Absorption Spectrometric Method ISO Guide 35: 1989 Certification of Reference Materials- General and Statistical Principles
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E50 Practices for Apparatus, Reagents, and Safety Considerations for Chemical Analysis of Metals, Ores, and Related Materials
E135 Terminology Relating to Analytical Chemistry for Metals, Ores, and Related Materials
E882 Guide for Accountability and Quality Control in the Chemical Analysis Laboratory
E1335 Test Methods for Determination of Gold in Bullion by Fire Assay Cupellation Analysis
ICS Number Code 73.060.01 (Metalliferrous minerals and their concentrates in general)
UNSPSC Code 11101600(Ores); 41113808(Gravimeters)
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ASTM E2294-03(2013), Standard Practice for Proof Silver Corrections in Metal Bearing Ores, Concentrates, and Related Materials by Fire Assay Gravimetry, ASTM International, West Conshohocken, PA, 2013, www.astm.orgBack to Top