ASTM E945 - 12

    Standard Test Method for Determination of Zinc in Zinc Ores and Concentrates by EDTA Complexometric Titrimetry

    Active Standard ASTM E945 | Developed by Subcommittee: E01.02

    Book of Standards Volume: 03.05


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    Significance and Use

    This test method is primarily intended to test materials for compliance with compositional specifications. It is assumed that all who use this test method will be trained analysts working in properly equipped laboratories.

    Appropriate quality control practices shall be followed such as those described in Guide E882.

    1. Scope

    1.1 This test method covers the determination of zinc in ores, concentrates, and related materials having chemical composition within the following limits:

    ElementApplication Range, %
    Zinc5.0 to 70.0
    Lead0.5 to 50.0
    Copper0.1 to 3.0
    Iron0.5 to 16.0
    Sulfur4.0 to 30.0
    Calcium0.1 to 20.0
    Magnesium0.1 to 10.0
    Cadmium0.1 to 8.0
    Arsenic0.01 to 1.0
    Antimony0.01 to 0.005
    Bismuth0.001 to 0.1
    Cobalt0.1 to 0.5
    Nickel0.3 to 3.0
    Silver0.00 to 150 oz/ton
    Gold0.00 to 1.0 oz/ton

    Note 1—As used in this test method, percent or % refers to a mass fraction.

    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.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D1193 Specification for Reagent Water

    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

    E173 Practice for Conducting Interlaboratory Studies of Methods for Chemical Analysis of Metals

    E663 Practice for Flame Atomic Absorption Analysis

    E882 Guide for Accountability and Quality Control in the Chemical Analysis Laboratory

    E1601 Practice for Conducting an Interlaboratory Study to Evaluate the Performance of an Analytical Method


    ICS Code

    ICS Number Code 73.060.99 (Other metalliferrous minerals)

    UNSPSC Code

    UNSPSC Code 11101609(Zinc ore)


    DOI: 10.1520/E0945-12

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