【国外标准】 Standard Test Method for Determination of Zinc in Zinc Ores and Concentrates by EDTA Complexometric Titrimetry (Withdrawn 2021)

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 E882.1.1 This test method covers the determination of zinc in ores, concentrates, and related materials having chemical composition within the following limits:Element Application Range, % Zinc 5.0 to 70.0Lead 0.5 to 50.0Copper 0.1 to 3.0Iron 0.5 to 16.0Sulfur 4.0 to 30.0Calcium 0.1 to 20.0Magnesium 0.1 to 10.0Cadmium 0.1 to 8.0Arsenic 0.01 to 1.0Antimony 0.01 to 0.005Bismuth 0.001 to 0.1Cobalt 0.1 to 0.5Nickel 0.3 to 3.0Silver 0.00 to 150 oz/tonGold 0.00 to 1.0 oz/tonNote 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.