AS 2917.1-1994

1 - AS 2917.1-1994 COPPER SULFIDE CONCENTRATES - DETERMINATION OF COPPER CONTENT - TITRIMETRIC METHODS
4 - PREFACE
5 - CONTENTS
7 - 1 Scope
7 - 2 Normative references
7 - 3 Principl e
7 - 3.1 Method 1 (Long iodide method)
7 - 3.2 Method 2 (Short iodide method)
7 - 4 Reagents
7 - 4.1 Copper metal,
7 - 4.2 Potassium iodide.
7 - 4.3 Ammonium hydrogen difluoride.
8 - 4.4 Sulfuric acid,
8 - 4.5 Sulfuric acid,
8 - 4.6 Nitric acid,
8 - 4.7 Nitric acid,
8 - 4.8 Hydrofluoric acid
8 - 4.9 Bromine.
8 - 4.10 Bromine water,
8 - 4.11 Hydrobromic acid
8 - 4.12 Acetic acid
8 - 4.13 Nitration mixture.
8 - 4.14 Ammonium hydrogen difluoride
8 - 4.15 Sodium carbonate
8 - 4.16 Sodium thiosulfate pentahydrate
8 - 4.17 Potassium thiocyanate
8 - 4.18 Starch,
8 - 4.19 Ethanol.
8 - 4.20 Standard solutions.
8 - 4.20.1 Sodium thiosulfate
9 - 4.20.2 Copper
9 - 5 Apparatus
9 - 5.1 Volumetric glassware,
9 - 5.2 Analytical balance,
9 - 5.3 Platinum crucibles.
9 - 5.4 Atomic absorption spectrometer (AAS),
9 - 5.5 Inductively coupled plasma (ICP) atomic emission spectrometer
9 - 6 Sample
9 - 6.1 Test sample
9 - 6.2 Test portion
9 - 7 Procedure
9 - 7.1 Number of determinations
9 - 7.2 Blank test
9 - 7.3 Determination -method 1: Long iodide method
9 - 7.3.1 Decomposition of test portion
10 - 7.3.2 Separation of copper
10 - 7.3.3 Dissolution of copper precipitate
10 - 7.3.4 Titration
11 - 7.3.5 FAAS determination of copper in the insoluble residue, filtrate and filter paper
11 - 7.4 Determination -method 2: Short iodide method
11 - 7.4.1 Decomposition of the test portion
12 - 7.4.2 Titration
12 - 8 Expressi on of results
12 - 9 Precision
12 - 9.1 Expression of precision
12 - 9.2 Method for obtaining the final result
13 - 9.3 Precision between laboratories
13 - 9.4 Check of trueness
13 - 9.4.1 Type of certified reference material (CRM) or reference material (RM)
14 - 10 Test report
15 - Annex A - Procedure for the preparation and determination of the mass of a predried test portion
15 - A.1 Scope
15 - A.2 Principle
15 - A.3 Chemicals
15 - A.4 Apparatus
15 - A.5 Procedure
16 - A.6 Calculation of the dry mass of the test
17 - Annex B - Flowsheet of the procedure for the acceptance of analytical values for test samples
18 - Annex C - Derivation of precision equations
18 - C.1 Introduction
18 - C.2 Design of the test programme
18 - C.3 Test samples
18 - C.4 Statistical evaluation

AS 2917.1-1994 identically adopts ISO 10258, which specifies two titrimetric methods for the determination of the copper content of copper sulfide concentrates in the range 15 % (m/m) to 50 % (m/m), using sodium thiosulfate after separation (method 1) or without separation (method 2) of copper from interfering elements.

This International Standard specifies two titrimetric methods for the determination of the copper content of copper sulfide concentrates in the range 15 % (m/m) to 50 % (m/m), using sodium thiosulfate after separation (method 1) or without separation (method 2) of copper from interfering elements.

First pubished as AS 2917.1-1986.
Second edition 1994.