【国外标准】 Standard Test Methods for Chemical Analysis of Magnesium and Magnesium Alloys (Withdrawn 2008)

These test methods for the chemical analysis of metals and alloys are primarily intended to test such materials for compliance with compositional specifications. It is assumed that all who use these test methods will be trained analysts capable of performing common laboratory procedures skillfully and safely. It is expected that work will be performed in a properly equipped laboratory.1.1 These test methods cover the chemical analysis of magnesium and magnesium alloys having chemical compositions within the following limits:Aluminum, % 0.5 to 12Copper, % 0.005 to 0.1Iron, % 0.002 to 0.1Lead, % 0.001 to 0.5Manganese, % 0.01 to 2.0Nickel, % 0.0005 to 0.5Rare earth elements, % 0.2 to 10Silicon, % 0.01 to 0.8Thorium, % 0.2 to 25Tin, % 0.5 to 10Zinc, % 0.3 to 20Zirconium, % 0.03 to 1.0Magnesium, % remainder1.2 The analytical procedures appear in the following order: SectionAluminum: Benzoate-Oxinate (Gravimetric) Method 8-15Sodium Hydroxide (Potentiometric) Method (Optional Routine Method) 16-23Copper: Neocuproine (Photometric) Method 24-33Hydrobromic Acid-Phosphoric Acid (Photometric) Method 34-43Iron by the 1,10-Phenanthroline (Photometric) Method 44-53Lead by the Dithizone (Photometric) Method 54-63Magnesium-Analysis for Manganese an Zinc by Direct Current Plasma Spectroscopy (Proposal) Manganese by the Periodate (Photometric) Method 64-73Nickel: Dimethylglyoxime Extraction (Photometric) Method 74-83Dimethylglyoxime (Gravimetric) Method 84.-91Rare Earth Elements by the Sebacate-Oxalate (Gravimetric) Method 92-98Silicon: Perchloric Acid (Gravimetric) Method 99-104Molybdosilicic Acid (Photometric) Method 105-114Thorium by the Benzoate-Oxalate (Gravimetric) Method 115-121Tin by the Iodine (Volumetric) Method 122-129Zinc: Ethylenediamine Tetraacetate (Volumetric) Method 130-137Potassium Ferrocyanide (Volumetric) Method 138-144Zirconium by the Alizarin Red (Photometric) Method 145-1541.3 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. Specific precautions are given in Section 5.