Table 1 Test setup for the applied version of TS-2 and CEN/TS 15119-2 as well as OECD 313 experiments using treated wood
From: Laboratory leaching tests on treated wood according to different harmonised test procedures
Parameter | TS-2 | CEN/TS 15119-2 and OECD 313 | ||||
|---|---|---|---|---|---|---|
Test specimens and treatment with wood preservatives | Representative of the product to be tested | Quality parameters for wood are defined (e.g. 100% sapwood), reference to EN 113 | ||||
Preparation procedure to be developed by the respective product Technical Committees | ||||||
Treatment and conditioning of test specimens as in accordance with either the recommendations made by the supplier, commercial treatment practices or EN 252 | ||||||
Test specimens with a retention within 5% of the mean are selected and end-sealed to prevent leaching via the end grain | ||||||
Test assemblies | At least one test piece per test assembly | TS 15119-2: exposed surface area: ≥200 cm2, number of test specimens per test assembly: ≥3 | ||||
Monolithic products: all dimensions >40 mm | ||||||
OECD 313: sets of five test specimens according to EN 113 size blocks are recommended (yield 200-cm2 exposed surface area) | ||||||
Flat products (sheet-like and plate-like): minimum of exposed surface area: 100 cm2, one dimension <40 mm | ||||||
Water | Demineralised water or deionised water or water of equivalent purity with a conductivity <0.5 mS/m according to grade 3 specified in ISO 3696 | CEN/TS 15119-2: water complying with grade 3 of EN ISO 3696, water especially designed for environmental investigations or deionised water, pH 5 to 7 (not adjusted) | ||||
OECD 313: deionised water is recommended, synthetic seawater has to be used when wood exposed to seawater is to be evaluated | ||||||
L/A ratio | 8 ml/cm2 | 2.5 ml/cm2 | ||||
Temperature | 20°Ca | 20°C ±2°C | ||||
Sampling schemesa | Day | Sample number (eluate fraction) | Total duration of the test [days] | Day | Sample number (eluate fraction) | Total duration of the test [days] |
1 | 1 | 0.08 | 1 | 1 | 0.25 | |
2 | 2b | 1 | 2 | 2 | 1 | |
3 | 3 | 2.25 | 3 | 3 | 2 | |
9 | 4b | 8 | 5 | 4 | 4 | |
15 | 5 | 14 | 9 | 5 | 8 | |
16 | 6 | 15 | 16 | 6 | 15 | |
29 | 7b | 28 | 23 | 7 | 22 | |
37 | 8 | 36 | 30 | 8 | 29 | |