ASTM E35-88(1997)

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 12 Copper, % 0.005 to 0.1 Iron, % 0.002 to 0.1 Lead, % 0.001 to 0.5 Manganese, % 0.01 to 2.0 Nickel, % 0.0005 to 0.5 Rare earth elements, % 0.2 to 10 Silicon, % 0.01 to 0.8 Thorium, % 0.2 to 25 Tin, % 0.5 to 10 Zinc, % 0.3 to 20 Zirconium, % 0.03 to 1.0 Magnesium, % remainder

1.2 The analytical procedures appear in the following order:

Section Aluminum: Benzoate-Oxinate (Gravimetric) Method 8 to 15 Sodium Hydroxide (Potentiometric) Method (Op- tional Routine Method) 16 to 23 Copper: Neocuproine (Photometric) Method 24 to 33 Hydrobromic Acid-Phosphoric Acid (Photometric) Method 34 to 43 Iron by the 1,10-Phenanthroline (Photometric) Method 44 to 53 Lead by the Dithizone (Photometric) Method 54 to 63 Magnesium---Analysis for Manganese and Zinc by Direct Current Plasma Spectroscopy (Proposal) 2 Manganese by the Periodate (Photometric) Method 64 to 73 Nickel: Dimethylglyoxime Extraction (Photometric) Method 74 to 83 Dimethylglyoxime (Gravimetric) Method 84 to 91 Rare Earth Elements by the Sebacate-Oxalate (Gravi- metric) Method 92 to 98 Silicon: Perchloric Acid (Gravimetric) Method 99 to 104 Molybdosilicic Acid (Photometric) Method 105 to 114 Thorium by the Benzoate-Oxalate (Gravimetric) Method 115 to 121 Tin by the Iodine (Volumetric) Method 122 to 129 Zinc: Ethylenediamine Tetraacetate (Volumetric) Method 130 to 137 Potassium Ferrocyanide (Volumetric) Method 138 to 144 Zirconium by the Alizarin Red (Photometric) Method 145 to 154

1.3 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use. Specific precautions are given in Section 5.