ISO 15181-5:2008
Paints and varnishes — Determination of release rate of biocides from antifouling paints — Part 5: Calculation of the tolylfluanid and dichlofluanid release rate by determination of the concentration of dimethyltolylsulfamide (DMST) and dimethylphenylsulfamide (DMSA) in the extract
Paints and varnishes — Determination of release rate of biocides from antifouling paints — Part 5: Calculation of the tolylfluanid and dichlofluanid release rate by determination of the concentration of dimethyltolylsulfamide (DMST) and dimethylphenylsulfamide (DMSA) in the extract
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 17
- Дата публикации:
- 8 мая 2008 г.
- Издание:
- ISO IS 15181 edition 1 version 1
- ICS:
- 87.040
ISO 15181-5:2008 specifies the apparatus and analytical method for determining the amount of tolylfluanid and dichlofluanid that has been released from an antifouling paint into artificial seawater in accordance with the procedure given in ISO 15181-1. Tolylfluanid and dichlofluanid are unstable in the marine environment and degrade to form dimethyltolylsulfamide (DMST) and dimethylphenylsulfamide (DMSA) respectively. ISO 15181-5:2008 specifies a method for converting the released species into these degradation products, quantifying their concentration in the treated artificial seawater samples, and gives the final calculation for the release rate of tolylfluanid and dichlofluanid under the specified laboratory conditions. ISO 15181-5:2008 is designed to allow the concurrent determination of tolylfluanid, dichlofluanid and other biocides that can be released by a given antifouling paint (for example, copper) 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 1,3 micrograms per square centimetre per day to 500 micrograms per square centimetre per day. The quantitation of release rates lower than this range will require the use of an analytical method with a lower limit of quantitation for tolylfluanid, dichlofluanid, or both (as appropriate) in artificial seawater
Abstract
Overview
ISO 15181-5:2008 - Paints and varnishes - Determination of release rate of biocides from antifouling paints (Part 5) - defines an analytical procedure to calculate the laboratory release rates of tolylfluanid and dichlofluanid from antifouling coatings. Because these biocides are unstable in seawater, the standard specifies conversion of the released species to their stable degradation products - dimethyltolylsulfamide (DMST) and dimethylphenylsulfamide (DMSA) - and quantification of DMST/DMSA in treated artificial seawater extracts to derive the release rate under standardized laboratory conditions.
Key topics and technical requirements
- Scope & principle: Measures biocide release by promoting controlled degradation of tolylfluanid/dichlofluanid into DMST/DMSA and quantifying those products.
- Analytical method: High-performance liquid chromatography (HPLC) or an equivalent instrument with a limit of quantitation (LOQ) for tolylfluanid/dichlofluanid in artificial seawater of ≤ 7 µg/L. HPLC system components described include gradient pump, UV detector (monitoring ~195 nm), autosampler, reverse-phase C18 column and column oven (40 °C).
- Calibration & reagents: Preparation of DMST/DMSA calibration standards from certified reference materials; use of acidified artificial seawater matrix; use of HPLC-grade solvents and specified reagents.
- Quantitation range: When used with ISO 15181-1 extraction procedure, practical release-rate quantification ranges from 1.3 µg·cm⁻²·d to 500 µg·cm⁻²·d. Lower rates require more sensitive analytical methods.
- Validation & reporting: Includes requirements for recovery checks, LOQ determination (modified from ASTM D6442), and detailed test reporting to ensure traceability and reproducibility.
Applications and users
- Antifouling paint manufacturers: product development, quality control and batch verification of biocide release behavior.
- Analytical laboratories: standardized method for measuring DMST/DMSA in artificial seawater extracts and calculating biocide release rates.
- Coating specifiers and shipyards: comparative assessment of antifouling formulations under controlled conditions.
- Regulatory and environmental scientists: laboratory data generation for comparative purposes - with caution: ISO 15181-5 results are generated under standardized laboratory conditions and typically overestimate in-service environmental release; users should apply appropriate correction factors when estimating real-world environmental loading or risk.
Related standards
- ISO 15181-1: General method for extraction of biocides (required companion document)
- ISO 15181-2, -3, -4: Methods for other biocides (e.g., copper, zineb, PTPB)
- ISO 3696: Water for analytical laboratory use
- ASTM D6442-06: LOQ determination guidance (referenced/adapted)
Keywords: ISO 15181-5:2008, tolylfluanid, dichlofluanid, DMST, DMSA, antifouling paints, release rate, HPLC, artificial seawater, biocide quantification.
Технические детали
- Технический комитет
- ISO/TC 35/SC 9 - General test methods for paints and varnishes
- SKU
- ISO 15181-5:2008
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