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Paints and varnishes — Determination of release rate of biocides from antifouling paints — Part 4: Determination of pyridine-triphenylborane (PTPB) concentration in the extract and calculation of the release rate
This part of ISO 15181 is designed to allow the concurrent determination of PTPB and other biocides that can be released by a given antifouling paint (for example, zineb) through the analysis of separate sub-samples of an artificial seawater extract generated in accordance with the procedure given in ISO 15181‑1.
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 an additional concentration step described in the text or the use of an analytical method with a lower limit of quantitation for PTPB in artificial seawater.
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