ISO 24048-2022 PDF

Full title and description

Plastics — Determination of bound acrylonitrile content in the continuous phase of acrylonitrile‑butadiene‑styrene (ABS) by Dumas combustion method. This international standard specifies a laboratory analytical procedure using Dumas combustion to determine the mass fraction of bound acrylonitrile in the continuous phase of ABS copolymer (intended for routine quality control, specification and verification of ABS materials).

Abstract

ISO 24048:2022 defines a quantitative test method based on Dumas combustion for measuring the bound acrylonitrile content in the continuous (matrix) phase of ABS resins. The procedure is applicable to ABS materials with a mass fraction of bound acrylonitrile in the continuous phase between approximately 5 % and 50 %. The standard sets out required sample preparation, combustion and nitrogen measurement steps and gives guidance on calculation of results.

General information

• Status: Published (International Standard)
• Publication date: 17 November 2022
• Publisher: International Organization for Standardization (ISO)
• ICS / categories: 83.080.20 (Thermoplastic materials)
• Edition / version: Edition 1 (2022)
• Number of pages: 8

Details and bibliographic metadata are taken from the ISO bibliographic record and national distribution entries.

Scope

This document specifies a method for the determination of bound acrylonitrile content in the continuous phase of ABS copolymer using the Dumas combustion method. It is applicable to ABS resin where the mass fraction of bound acrylonitrile in the continuous phase lies in the approximate range 5 % to 50 %. The method is intended for laboratory use on production, quality-control and research samples of ABS and is not a specification for product acceptance limits.

Key topics and requirements

• Analytical principle: Dumas combustion (oxidative combustion with measurement of nitrogen-containing combustion products to determine acrylonitrile-derived nitrogen).
• Scope of applicability: continuous (matrix) phase of ABS; reporting range approximately 5–50 % bound acrylonitrile by mass.
• Sample preparation guidance to isolate or account for the continuous phase composition prior to analysis.
• Calibration and calculation procedures to convert measured nitrogen to bound acrylonitrile content.
• Requirements for repeatability, reporting format and expression of results (mass fraction, %).

Typical use and users

Primary users are plastics testing laboratories, ABS resin manufacturers, compounders, recyclers and downstream product manufacturers performing quality control, incoming material verification, research and failure analysis. Regulators and certification bodies may use the method as a recognized analytical reference for composition checks. Test houses that perform chemical composition analysis of thermoplastics will commonly adopt this method where bound acrylonitrile content in ABS is required.

Related standards

ISO 24048 complements other test methods and standards for plastics characterization (thermal analysis, spectroscopy and compositional testing) and sits alongside national/adopted test standards used for ABS and general thermoplastic analysis. Laboratories often use it together with standards covering sample conditioning, general terminology for plastics testing and analytical quality assurance practices.

Keywords

ABS, acrylonitrile, bound acrylonitrile, Dumas combustion, plastics testing, thermoplastics, analytical method, quality control, composition analysis

FAQ

Q: What is this standard?

A: ISO 24048:2022 is an international test method that specifies how to determine the bound acrylonitrile content in the continuous phase of ABS using the Dumas combustion technique.

Q: What does it cover?

A: It covers sample handling and preparation for the continuous phase of ABS, the Dumas combustion measurement procedure, calibration and calculation steps, and reporting of results for mass fractions of bound acrylonitrile approximately between 5 % and 50 %.

Q: Who typically uses it?

A: Users include materials testing laboratories, ABS and polymer manufacturers, compounders, recyclers, product manufacturers performing incoming quality checks and researchers studying ABS composition and properties.

Q: Is it current or superseded?

A: ISO 24048:2022 was published on 17 November 2022 and is the current edition (Edition 1). There is no indication in the ISO bibliographic record that it has been superseded as of its publication record.

Q: Is it part of a series?

A: The standard is a standalone analytical test method within the body of ISO plastics test standards (developed under ISO/TC 61/SC 9). It relates functionally to other plastics testing and characterization standards but is not formally a numbered series of sequential parts.

Q: What are the key keywords?

A: Acrylonitrile, ABS, bound acrylonitrile, Dumas combustion, thermoplastic, composition analysis, plastics testing, quality control.