1 - AS/NZS 1580.501.2:1994 PAINTS AND RELATED MATERIALS-METHODS OF TEST - PREPARATION OF ACID EXTRACTS
1 - PREFACE
2 - METHOD
2 - 0 Introduction
2 - 1 Scope and field of application
2 - 2 References
2 - 3 Definitions
2 - 3.1 pigment
2 - 3.2 "soluble" metal content of liquid paint
2 - 3.3 "soluble" metal content of paint in powder form
2 - 4 Principle
3 - 5 Sampling
3 - 6 Separation of the pigment from the liquid paint sample
3 - 6.1 Preparation of the test sample
3 - 6.2 Reagents
3 - 6.3 Apparatus
3 - 6.3.1 Suitable laboratory centrifuge
3 - 6.3.2 Air-ventilated oven
3 - 6.3.3 Stoppered glass container
3 - 6.4 Procedure
3 - 6.4.1 Method A
4 - 6.4.2 Method B
4 - 6.4.3 Method C
4 - 6.5 Blank test solution
4 - 7 Treatment of paints in powder form
4 - 8 Acid extraction of the separated pigment and of paints in powder form
4 - 8.1 Treatment of the separated pigment
4 - 8.2 Method for the acid extraction of ”soluble” metals
4 - 8.2.1 Reagents
4 - 8.2.2 Apparatus
4 - 8.2.3 Procedure
5 - 8.3 Method for the acid extraction of ”soluble” lead
5 - 8.3.1 Preliminary determination of total lead
5 - 8.3.1.1 Principle
5 - 8.3.1.2 Reagents
5 - 8.3.1.3 Apparatus
5 - 8.3.1.4 Procedure
6 - 8.3.1.5 Calculation
6 - 8.3.2 Extraction procedure
6 - 8.3.2.1 Calculation of mass of test portion
6 - 8.3.2.2 Reagents
6 - 8.3.2.3 Apparatus
6 - 8.3.2.4 Procedure
6 - 8.4 Blank test solution
6 - 9 Treatment of the extracted liquid portion
6 - 9.1 Reagents
6 - 9.1.1 Nitric acid 1 + 1.
7 - 9.1.2 Hydrochloric acid diluted
7 - 9.2 Apparatus
7 - 9.2.1 Water-bath.
7 - 9.2.2 Hot-plate.
7 - 9.2.3 Muffle furnace
7 - 9.2.4 One-mark volumetric flask
7 - 9.3 Procedure