ISO 15181-6:2012
Paints and varnishes — Determination of release rate of biocides from antifouling paints — Part 6: Determination of tralopyril release rate by quantitation of its degradation product in the extract
Paints and varnishes — Determination of release rate of biocides from antifouling paints — Part 6: Determination of tralopyril release rate by quantitation of its degradation product in the extract
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 14
- Дата публикации:
- 10 июля 2012 г.
- Издание:
- ISO IS 15181 edition 1 version 1
- ICS:
- 87.040
ISO 15181-6:2012 specifies a method for determining the amount of tralopyril that has been released from an antifouling paint into artificial seawater in accordance with the procedure given in ISO 15181-1. Tralopyril is unstable in water and degrades hydrolytically to form 3-bromo-5-(4-chlorophenyl)-4-cyano-1H-pyrrole-2-carboxylic acid (BCCPCA). ISO 15181-6:2012 specifies a method for accelerating the conversion of the released tralopyril into this degradation product by heat treatment and quantifying the concentration of the BCCPCA degradation product in the artificial seawater extract, and gives the final calculation for the release rate of tralopyril under the specified laboratory conditions. ISO 15181-6:2012 is designed to allow the concurrent determination of tralopyril 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 ISO 15181-1. When used in conjunction with ISO 15181-1, the practical limits for quantifying release rates by this method are from 0,36 µg cm−2 d−1 to 270 µg cm−2 d−1. The quantitation of release rates lower than this range requires the use of an analytical method with a limit of quantitation for tralopyril in artificial seawater of less than 2 μg/l.
Abstract
Overview
ISO 15181-6:2012 defines a laboratory method for determining the release rate of tralopyril from antifouling paints into artificial seawater. Because tralopyril hydrolyses in water to form 3-bromo-5-(4-chlorophenyl)-4-cyano-1H-pyrrole-2-carboxylic acid (BCCPCA), the standard prescribes accelerating this conversion by heat treatment and quantifying BCCPCA in the extract to back-calculate the tralopyril release rate. The procedure is used together with ISO 15181-1 (general extraction method) and provides final calculations for release rate under specified laboratory conditions.
Key topics and requirements
- Analytical principle: accelerate hydrolytic conversion of tralopyril to BCCPCA by controlled heat treatment; quantify BCCPCA and express results as tralopyril release rate.
- Analytical method: high-performance liquid chromatography (HPLC) or equivalent with a limit of quantitation (LOQ) for tralopyril in artificial seawater of ≤ 2 µg/l. Typical HPLC requirements in the standard include:
- UV detection at 280 nm
- Reverse-phase C18 column (4.0 mm × 100 mm, ~3 µm)
- Column temperature ≈ 35 °C; autosampler capable of 200 µl injections
- Apparatus & reagents: thermostatically controlled cabinet for heat treatment (50 ± 5 °C), HPLC-grade acetonitrile, orthophosphoric acid, methanol or tetrahydrofuran for calibration, artificial seawater per ISO 15181-1, certified tralopyril and BCCPCA standards.
- Quantitative range: when used with ISO 15181-1, practical release-rate quantitation range is 0.36 µg·cm−2·d−1 to 270 µg·cm−2·d−1; lower rates require methods with LOQ
Технические детали
- Технический комитет
- ISO/TC 35/SC 9 - General test methods for paints and varnishes
- SKU
- ISO 15181-6:2012
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