ISO 7012-3:2025

Name: ISO 7012-3:2025 — Paints and varnishes — Determination of preservatives in water-dilutable coating materials — Part 3: Determination of in-can isothiazolinones with LC-UV and LC-MS
SKU: ISO 7012-3:2025
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Paints and varnishes — Determination of preservatives in water-dilutable coating materials — Part 3: Determination of in-can isothiazolinones with LC-UV and LC-MS

Название (английский):

ISO 7012-3:2025

Paints and varnishes — Determination of preservatives in water-dilutable coating materials — Part 3: Determination of in-can isothiazolinones with LC-UV and LC-MS

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 23
Дата публикации:: 1 апреля 2025 г.
Издание:: ISO IS 7012 edition 1 version 1
ICS:: 87.040

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Описание (английский):

This document specifies the apparatus and the analytical methods for determining the content of in-can isothiazolinone preservatives in water-dilutable coating materials or related products. This document is also applicable to polymer dispersions.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 7012-3:2025 specifies analytical methods for the determination of in-can isothiazolinone preservatives in water-dilutable coating materials (paints and varnishes) and related products, including polymer dispersions. The standard defines required apparatus, sample preparation and extraction, and chromatographic determination using liquid chromatography with UV/VIS detection (LC-UV/DAD) and liquid chromatography coupled to mass spectrometry (LC‑MS or LC‑MS/MS). Applicable ionization techniques include electrospray (ESI) and atmospheric pressure chemical ionization (APCI).

Key topics and technical requirements

Scope and applicability: Targeted at in‑can preservative analysis in water‑based coatings and polymer dispersions; the standard is part of the ISO 7012 series.

Principle: Homogenize and extract samples with an appropriate solvent, purify by centrifugation, then identify and quantify isothiazolinones by LC‑UV or LC‑MS(/MS).

Sample preparation & apparatus:

High‑speed centrifuge (e.g., 5 000–30 000 r/min noted as suitable)
Ultrasonic water bath (35–45 kHz)
Analytical balances, volumetric flasks (10–100 ml), 0.22 µm filtration membranes

Chromatography & detection:

Reverse phase C18 analytical columns (HPLC/UPLC/UHPLC compatible)
LC‑UV/DAD method and LC‑MS or LC‑MS/MS (single or tandem quadrupole)
LC‑MS requires LC‑MS grade solvents

Quality control & method performance:

Requirements for blanks, calibration procedures, interferences assessment and calculation
Precision statements including repeatability and reproducibility limits (method validation and interlaboratory testing are addressed)

Documentation: Test report contents and annexes give example LC conditions, MRM setups, extraction mechanics and interlaboratory results.

Practical applications and users

ISO 7012-3:2025 is intended for:

Quality control laboratories in paint, varnish and coating manufacturing verifying preservative content

Regulatory and compliance testing where control of in‑can biocides (isothiazolinones such as MIT/MBC etc.) is required

R&D teams developing water‑dilutable coatings and polymer dispersions to optimize preservative performance and stability

Third‑party testing labs performing routine or contract analyses using HPLC/UPLC with UV and MS detection

Practical benefits include standardized extraction and chromatographic procedures, harmonized reporting, and traceable calibration for consistent preservative measurement across laboratories.

Related standards

ISO 1513 (sample preparation)

ISO 3696 (laboratory water quality)

ISO 15528 (sampling)

ISO 4618 and ISO 11890-2 (terminology and related paint definitions)

Other parts of the ISO 7012 series (see ISO website for full listing)

Keywords: paints and varnishes, in‑can isothiazolinones, preservatives, LC‑UV, LC‑MS, LC‑MS/MS, HPLC, UPLC, polymer dispersions, analytical methods.

ISO 7012-3:2025

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Practical applications and users

Related standards

Технические детали

ISO 7012-2:2025

Paints and varnishes — Determination of preservatives in water-dilutable coating materials — Part 2: Determin…

BS EN ISO 1513:2010

Paints and varnishes. Examination and preparation of test samples.

BS EN ISO 3696:1995

Water for analytical laboratory use. Specification and test methods.

BS EN ISO 15528:2020

Paints, varnishes and raw materials for paints and varnishes. Sampling.

ISO 4618:2014

Paints and varnishes — Terms and definitions

ISO 11890-2:2013

Paints and varnishes — Determination of volatile organic compound (VOC) content — Part 2: Gas-chromatographic…