AS/NZS 1050.14:1994

1 - AS/NZS 1050.14:1994 METHODS FOR THE ANALYSIS OF IRON AND STEEL - DETERMINATION OF MANGANESE IN IRON AND STEEL-TITRIMETRIC METHOD
4 - PREFACE
4 - CONTENTS
5 - 1 SCOPE
5 - 2 REFERENCED DOCUMENTS
5 - 3 PRINCIPLE
5 - 4 REAGENTS
5 - 4.1 General requirements
5 - 4.2 Solutions
5 - 4.2.1 Sulfuric acid (r20 1.84 g/mL)
5 - 4.2.2 Sulfuric acid (500 mL/L)
5 - 4.2.3 Sulfuric acid (150 mL/L)
6 - 4.2.4 Sulfuric acid (50 mL/L)
6 - 4.2.5 Sulfuric acid (25 mL/L)
6 - 4.2.6 Ammonium hydroxide solution (500 mL/L)
6 - 4.2.7 Hydrochloric acid (r20 1.18 g/mL)
6 - 4.2.8 Nitric acid (r20 1.42 g/mL)
6 - 4.2.9 Sulfurous acid solution
6 - 4.2.10 Zinc oxide suspension
6 - 4.2.11 Phosphoric acid-sulfuric acid mixture
6 - 4.2.12 Ammonium persulfate solution (125 g/L)
6 - 4.2.13 Ammonium iron(II) sulfate solution (approx. 20 g/L)
6 - 4.2.14 Silver nitrate solution (10 g/L)
6 - 4.2.15 Potassium dichromate solution (0.008 334 mol/L)
6 - 4.2.16 Preoxidized sodium diphenylamine sulfonate solution (3.2 g/L)
7 - 5 APPARATUS
7 - 6 SAMPLING
7 - 7 PROCEDURE
7 - 7.1 Number of determinations
7 - 7.2 Blank test
7 - 7.3 Check test
7 - 7.4 Dissolution of sample
8 - 7.5 Removal of interfering elements
8 - 7.6 Determination of manganese content
9 - 7.7 Standardization of ammonium iron(II) sulfate solution
9 - 8 CALCULATIONS
9 - 9 PRECISION
10 - 10 ACCEPTANCE OF ANALYTICAL VALUES
10 - 10.1 Single test sample
10 - 10.2 Replicate determinations
11 - 10.3 Acceptance of reference material values
11 - 11 TEST REPORT

This method sets out a titrimetric method, using the permanganate ion formed by oxidation, for the determination of the manganese content of iron and steel. The method covers the range 0.50 percent to 15 percent manganese and is applicable to all grades of iron and steel.

This Standard sets out a titrimetric method, using the permanganate ion formed by oxidation, for the determination of the manganese content of iron and steel. The method covers the range 0.50% to 15% manganese and is applicable to all grades of iron and steel.

First published as AS K1.14-1960.
Revised and redesignated AS 1050.14-1981.
Jointly revised and designated as Joint Standard AS/NZS 1050.14:1994.