ISO 23702-1-2023 PDF

Full title and description

Leather — Per- and polyfluoroalkyl substances — Part 1: Determination of non-volatile compounds by extraction method using liquid chromatography. This International Standard specifies a laboratory test method for detecting and quantifying extractable non-volatile PFAS in leather and coated leather by solvent extraction followed by liquid chromatography with mass-spectrometric detection.

Abstract

The standard defines an extraction-based procedure and LC (liquid chromatography) analysis (typically coupled to MS/MS) to measure extractable neutral, ionic and chain-length variants of per- and polyfluoroalkyl substances (PFAS) in leather and coated leather. It accounts for the three-dimensional distribution of fibres within leather and lists regulated and non‑regulated PFAS classes in annexes to support identification and reporting. The document notes limitations (for example, potential release of fluorotelomer alcohols from some perfluoropolymers during methanolic extraction) and advises when additional sample treatments (e.g., alkaline hydrolysis) may be necessary.

General information

• Status: Published (current International Standard).
• Publication date: June 2023 (publication implemented 14 June 2023 in the ISO record).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 59.140.30 (Leather and furs).
• Edition / version: Edition 2 (2023).
• Number of pages: 25 (ISO published edition records 25 pages; national adoptions may show differing page counts due to formatting).

Scope

This part of ISO 23702 specifies a test method for the detection and quantification of extractable non-volatile PFAS in leather and coated leather by solvent extraction and liquid chromatography coupled with mass spectrometry. It covers a range of PFAS types (neutral, ionic, long-, medium- and short-chain) and gives guidance on sample preparation, extraction, analysis and reporting; annexes list substance categories and regulated classes (acids, telomers, sulfonates, sulphonamide alcohols) as well as other determinable non-regulated compounds. The method evaluates PFAS content with respect to sample mass.

Key topics and requirements

• Solvent extraction procedure tailored for leather and coated leather matrices (sample preparation and extraction conditions specified).
• Analysis by liquid chromatography coupled to mass spectrometric detection (LC–MS/MS recommended for sensitivity and selectivity).
• Quantification of extractable non‑volatile PFAS across chain lengths and ionic states; reporting referenced to sample mass.
• Annexes listing regulated PFAS classes and other determinable substances to support identification and compliance checks.
• Notes on method limitations: e.g., free FTOH may be over‑ or under‑estimated if perfluoropolymers release FTOH during methanolic extraction; alkaline hydrolysis may be necessary to detect polymer‑bound moieties in some cases.

Typical use and users

Laboratories performing chemical testing of leather, quality-control teams at tanneries and leather-product manufacturers, compliance and regulatory bodies monitoring PFAS restrictions, procurement specialists verifying material declarations, and product safety/eco‑labelling assessors. The method is used where accurate determination of extractable PFAS in leather is required for regulatory compliance, risk assessment or internal quality assurance.

Related standards

Normative references and related leather test standards commonly cited include ISO 2418 (position and preparation of specimens), EN 15987 (leather terminology) and ISO 3696 (water for analytical laboratory use). ISO 23702-1:2018 was the earlier edition and has been withdrawn and replaced by the 2023 edition. National or regional adoptions (e.g., BS EN ISO or UNE‑EN ISO versions) exist with varying publication dates and formatting.

Keywords

PFAS, per- and polyfluoroalkyl substances, leather testing, extraction, liquid chromatography, LC–MS/MS, non-volatile compounds, FTOH, sample preparation, leather chemistry.

FAQ

Q: What is this standard?

A: ISO 23702-1:2023 is an ISO International Standard that defines a laboratory method to detect and quantify extractable non‑volatile PFAS in leather and coated leather using solvent extraction followed by liquid chromatography with mass-spectrometric detection.

Q: What does it cover?

A: It covers sample preparation and extraction of leather, LC–MS analysis, quantification and reporting of extractable non‑volatile PFAS (neutral and ionic, various chain lengths), and includes annexes listing regulated and other determinable PFAS classes; it also flags method limitations and possible additional treatments (e.g., alkaline hydrolysis) for certain polymer-bound substances.

Q: Who typically uses it?

A: Analytical testing laboratories, tanneries and leather-product manufacturers, regulatory bodies and compliance auditors, procurement and product-safety teams, and organizations conducting PFAS risk assessment or verification of restricted-substance requirements.

Q: Is it current or superseded?

A: The 2023 edition (Edition 2) is the current published version of ISO 23702-1; the 2018 edition was withdrawn and replaced by the 2023 publication. National adoptions may carry different publication dates or formatting but reflect the 2023 ISO content.

Q: Is it part of a series?

A: It is designated “Part 1” of ISO 23702 (addressing non‑volatile PFAS by extraction/LC analysis). At present there is no widely published separate Part 2 listed under ISO 23702 in the ISO bibliographic records; users should check ISO and national bodies for any additional parts or related PFAS methods for leather.

Q: What are the key keywords?

A: PFAS, leather, extraction, liquid chromatography, LC–MS/MS, non-volatile PFAS, FTOH, analytical method, sample preparation.