ASTM E2294 Standard Practice for Proof Silver Corrections in Metal Bearing Ores, Concentrates and Related Materials by Fire Assay Gravimetry
ASTM E2294用火试金重量分析法验证含金属矿物,浓缩物及相关材料中银修正值的标准规范
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.
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 E 882.
1. Scope
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 E 1335, Practices E 50, Guide E 882, and ISO Guide 35: 1989.)

2. Referenced Documents (purchase separately)
ASTM Standards
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
Other Documents
ISO10378:1994 Copper Sulfide Concentrates-Determination of Gold and Silver Contents-Fire Assay Gravimetric and Atomic Absorption Spectrometric Method
Index Terms
cupellation; fire assay; silver; silver correction; Cupellation method; Cupels; Dor´e correction; Fire assay method; Gravimetric determination; Metal-bearing ores; Metallurgical materials/applications; Ores; Proof silver corrections; Silver corrections; Slag ;