1 - AS/NZS 1580.501.1:1994 PAINTS AND RELATED MATERIALS-METHODS OF TEST - SOLUBLE LEAD CONTENT
1 - PREFACE
2 - 0 Introduction
2 - 1 Scope and field of application
2 - 2 References
2 - 3 Flame atomic absorption spectrometric method
2 - 3.1 Principle
2 - 3.2 Reagents and materials
2 - 3.2.1 Hydrochloric acid
2 - 3.2.2 Acetylene
2 - 3.2.3 Compressed air.
3 - 3.2.4 Lead, standard solution containing 1 g of Pb per litre
3 - 3.2.5 Lead, standard solution containing 100 mg of Pb per litre
3 - 3.3 Apparatus
3 - 3.3.1 Flame atomic absorption spectrometer
3 - 3.3.2 Lead hollow-cathode lamp or lead discharge lamp.
3 - 3.3.3 Burette
3 - 3.3.4 One-mark volumetric flasks
3 - 3.4 Procedure
3 - 3.4.1 Preparation of the calibration graph
3 - 3.4.2 Test solutions
4 - 3.4.3 Determination
4 - 3.5 Expression of results
4 - 3.5.1 Calculations
4 - 3.5.1.1 Pigment portion of the liquid paint
4 - 3.5.1.2 Liquid portion of the paint
4 - 3.5.1.3 Liquid paint
4 - 3.5.1.4 Paint in powder form
4 - 3.5.1.5 Other test solutions
4 - 3.5.2 Precision
5 - 4 Dithizone spectrophotometric method
5 - 4.1. Principle
5 - 4.2 Reagents
5 - 4.2.1 Hydrochloric acid
5 - 4.2.2 Buffer solution.
5 - 4.2.3 Hydroxylammonium chloride
5 - 4.2.4 1,1,1-trichloroethane
5 - 4.2.5 Dithizone, stock solution.
5 - 4.2.6 Dithizone, working solution.
5 - 4.2.7 Lead, standard stock solution containing 1 g of Pb per litre
5 - 4.2.8 Lead, standard solution containing 10 mg of Pb per litre
5 - 4.3 Apparatus
5 - 4.3.1 Spectrophotometer
5 - 4.3.2 Separating funnels
5 - 4.3.3 Pipette
5 - 4.3.4 Burette
5 - 4.3.5 One-mark volumetric flasks
5 - 4.4 Procedure
5 - 4.4.1 Preparation of the calibration graph
6 - 4.4.2 Test solutions
6 - 4.4.3 Determination
6 - 4.5 Expression of results
6 - 4.5.1 Calculations
6 - 4.5.1.1 Pigment portion of the liquid paint
6 - 4.5.1.2 Liquid portion of the paint
7 - 4.5.1.3 Liquid paint
7 - 4.5.1.4 Paint in powder form
7 - 4.5.1.5 Other test solutions
7 - 4.5.2 Precision
7 - 5 Test report