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Significance and Use
5.1 This practice is primarily to be used to dry samples for the determination of mercury test portions, and it should not be used for the determination of sample moisture content. Most sample preparation methods prescribe drying the samples at 105 °C, until a constant mass is obtained. The moisture content is determined as the percentage mass loss on drying. However, since mercury can volatize from samples at the normally utilized temperature, samples that are to be used for mercury determination shall be dried at 60 °C (see Practice E877, ISO 9599, ISO 12743, and ISO 10251).
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 sample drying step for the determination of mercury in 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
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
E877 Practice for Sampling and Sample Preparation of Iron Ores and Related Materials for Determination of Chemical Composition and Physical Properties
E882 Guide for Accountability and Quality Control in the Chemical Analysis Laboratory
Other DocumentsISO 10251 Copper, Lead, and Zinc Sulfide Concentrates -Determination of Mass Loss of Bulk Material on Drying ISO 12743 Copper, Lead, and Zinc Sulfide Concentrates -Sampling Procedures for the Determination of Metal and Moisture Content ISO 9599 Copper, Lead, and Zinc Sulfide Concentrates-Determination of Hygroscopic Moisture in the Analysis Sample-Gravimetric Method
ICS Number Code 73.060.99 (Other metalliferrous minerals)
UNSPSC Code 11101600(Ores)