AS 2678.2-2008

1 - AS 2678.2-2008 Zinc sulfide concentrates-Chemical analysis - Part 2: Determination of zinc-Ion-exchange/EDTA titrimetric method
4 - PREFACE
5 - CONTENTS
7 - 1 Scope
7 - 2 Normative references
7 - 3 Principle
7 - 4 Reagents
9 - 5 Apparatus
9 - 6 Sample
9 - 6.1 Test sample
9 - 6.2 Test portion
9 - 7 Procedure
9 - 7.1 Number of determinations
10 - 7.2 Blank test
10 - 7.3 Dissolution of test portion
10 - 7.4 Preparation of the ion-exchange column
11 - 7.5 Adsorption of zinc on ion-exchange column
11 - 7.6 Elution of zinc from ion-exchange column
11 - 7.7 Titration
11 - 7.8 Determination of the titration factor of the EDTA standard volumetric solution
12 - 8 Expression of results
13 - 9 Precision
13 - 9.1 Expression of precision
13 - 9.2 Procedure for obtaining the final result
13 - 9.3 Between-laboratories precision
14 - 9.4 Check of trueness
15 - 10 Test report
16 - Annex A (normative) Ion-exchange resins and columns
18 - Annex B (normative) Procedure for the preparation and determination of the mass of a predried test portion
20 - Annex C (normative) Determination of cadmium by atomic absorption spectrometry
22 - Annex D (normative) Flowchart of the procedure for the acceptance of analytical values for test samples
23 - Annex E (informative) Effect of potentially interfering elements
24 - Annex F (informative) Derivation of precision equations
29 - Bibliography