Paints and varnishes. Determination of release rate of biocides from antifouling paints. Part 2: Determination of copper-ion concentration in the extract and calculation of the release rate (ISO 15181-2:2007)
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ISO 15181-2:2007 specifies the apparatus and analytical method for determining the amount of copper (based) biocide that has been released from an antifouling paint into artificial seawater in accordance with the procedure given in ISO 15181-1. It determines the copper-ion concentration and gives the final calculation for the release rate of copper under the specified laboratory conditions. It is designed to generally allow the concurrent determination of copper ions and other biocides that might be released by a given antifouling paint through the analysis of separate sub-samples of an artificial seawater extract generated in accordance with the procedure given in ISO 15181-1, and analysed in accordance with the procedures given in other parts of this International Standard. When used in conjunction with ISO 15181-1, the practical limits on the quantitative measurement of release rates by this method are from 1,8 micrograms per square centimetre per day to 500 micrograms per square centimetre per day. The quantitative measurement of release rates below this range will require the use of an analytical method with a lower limit of quantitation for copper.
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Sisällysluettelo
Foreword
Introduction
1 Scope
2 Normative references
3 Principle
4 Supplementary information required for the copper extraction procedure
5 Apparatus
6 Reagents and materials
7 Test samples
8 Procedure
8.1 General
8.2 Sample treatment
8.3 Preparation of standard calibration solutions
8.4 Preparation of recovery check standards
8.5 Instrument calibration
8.6 Sample determination
9 Calculation and expression of results
9.1 Calculation of copper concentration
9.2 Release rate for each test cylinder
9.3 Mean release rate for each set of three cylinders
9.4 Cumulative copper release
9.5 Mean copper release rate
9.6 Pseudo-steady-state mean copper release rate
10 Precision
10.1 Repeatability
10.2 Reproducibility
11 Test report
Annex A Supplementary information required for the copper extraction procedure (normative)
ASTM D 6442:2006 Standard Test Method for Determination of Copper Release Rate From Antifouling Coatings in Substitute Ocean Water
ISO 15181-1:2007 Paints and varnishes -- Determination of release rate of biocides from antifouling paints -- Part 1: General method for extraction of biocides
ISO 3696:1987 Water for analytical laboratory use -- Specification and test methods
ASTM D 6442:2006 Standard Test Method for Determination of Copper Release Rate From Antifouling Coatings in Substitute Ocean Water
ISO 15181-1:2007 Paints and varnishes -- Determination of release rate of biocides from antifouling paints -- Part 1: General method for extraction of biocides
ISO 3696:1987 Water for analytical laboratory use -- Specification and test methods