ISO 15181-4-2008 PDF

Full title and description

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 specifies the apparatus, reagents and analytical procedure (including sample preparation and quantification) required to determine the amount of PTPB released from antifouling coatings into artificial seawater and to calculate the corresponding release rate under the laboratory conditions specified in ISO 15181‑1.

Abstract

ISO 15181‑4:2008 defines a validated analytical method for measuring PTPB concentration in artificial seawater extracts produced according to ISO 15181‑1 and gives the calculation procedure to express that measurement as a release rate (µg·cm‑2·day‑1). The method covers sample conditioning, solid‑phase extraction, chromatographic analysis and limits of quantitation useful for routine laboratory testing of antifouling paints.

General information

• Status: Published (International Standard, confirmed through ISO systematic review).
• Publication date: 2008‑08 (ISO publication year 2008).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 87.040 (Paints and varnishes).
• Edition / version: Edition 1 (2008).
• Number of pages: 12 (ISO bibliographic record).

Scope

This document specifies the apparatus, reagents, sample‑treatment and instrumental-analysis procedures required to determine the concentration of pyridine‑triphenylborane (PTPB) in artificial seawater extracts produced from coated test panels following ISO 15181‑1. It provides the calculation method to convert measured concentration into a release rate (µg·cm‑2·day‑1) and gives practical measurement limits, validation and reporting requirements for routine and comparative laboratory testing.

Key topics and requirements

• Definition of principle: quantification of PTPB released into artificial seawater and calculation of release rate per unit area and time.
• Required apparatus and materials: sample vessels, solid‑phase extraction cartridges (C‑18), chromatographic instrumentation and calibration standards.
• Sample preparation and extraction: addition of pyridine to seawater samples, SPE conditioning and elution details, flow rates and volumes.
• Analytical determination: recommended chromatographic conditions, detection and quantitation procedures, instrument operation and calibration checks.
• Performance characteristics and limits: practical quantitative range (approx. 1.8 to 500 µg·cm‑2·day‑1 under the stated laboratory conditions) and guidance for lower‑level measurements (concentration steps or alternative methods).
• Method validation and quality control: required validation checks, blanks, recovery tests and reporting elements to ensure comparability between laboratories.
• Calculation and reporting: explicit calculation steps to convert measured concentration to release rate and required items for the test report.

Typical use and users

ISO 15181‑4 is used by analytical and environmental testing laboratories, marine coatings manufacturers, R&D groups developing antifouling formulations, conformity assessment bodies and regulatory authorities assessing environmental release of biocides from coatings. It supports product development, comparative testing, regulatory dossiers and laboratory intercomparisons.

Related standards

Part of the ISO 15181 series (Paints and varnishes — Determination of release rate of biocides from antifouling paints). Related parts include ISO 15181‑1 (general method for generating extracts), ISO 15181‑2 (copper ion determination and calculation), ISO 15181‑3 (zineb via ethylenethiourea), ISO 15181‑5 (tolylfluanid and dichlofluanid via DMST/DMSA) and other parts under development addressing additional biocides and degradation products. Users commonly apply ISO 15181‑4 together with ISO 15181‑1 for complete release‑rate testing.

Keywords

Antifouling paints; biocide release rate; PTPB; pyridine‑triphenylborane; solid‑phase extraction; chromatographic analysis; marine coatings testing; ISO 15181; paints and varnishes.

FAQ

Q: What is this standard?

A: ISO 15181‑4:2008 is an international test method that specifies how to determine the concentration of pyridine‑triphenylborane (PTPB) released from antifouling paints into artificial seawater and how to calculate the release rate.

Q: What does it cover?

A: It covers apparatus, reagents, sample preparation (including SPE), instrumental analysis (chromatography), calculation of release rate, validation and reporting requirements for PTPB measurement in artificial seawater extracts produced using ISO 15181‑1.

Q: Who typically uses it?

A: Analytical and environmental testing laboratories, marine coatings manufacturers (R&D and quality), conformity assessors and regulators concerned with the environmental performance and compliance of antifouling products.

Q: Is it current or superseded?

A: According to the ISO bibliographic record, ISO 15181‑4:2008 was published in 2008 and has been confirmed in ISO systematic reviews; the ISO record lists the standard as published/confirmed (status entries include confirmations in subsequent review cycles). Users should check with their national standards body or ISO catalogue for any amendments or more recent revisions before use.

Q: Is it part of a series?

A: Yes — it is Part 4 of the ISO 15181 series addressing biocide release‑rate determination from antifouling paints (other parts cover general extraction, copper, zineb, tolylfluanid/dichlofluanid, etc.).

Q: What are the key keywords?

A: PTPB; pyridine‑triphenylborane; biocide release rate; antifouling paints; solid‑phase extraction; chromatographic analysis; marine coatings.