ISO 24048:2022 PDF

Name: ISO 24048:2022 — Plastics — Determination of bound acrylonitrile content in the continuous phase of acrylonitrile-butadiene-styrene (ABS) by Dumas combustion method
SKU: ISO 24048:2022
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Plastics — Determination of bound acrylonitrile content in the continuous phase of acrylonitrile-butadiene-styrene (ABS) by Dumas combustion method

Название (английский):

ISO 24048:2022

Plastics — Determination of bound acrylonitrile content in the continuous phase of acrylonitrile-butadiene-styrene (ABS) by Dumas combustion method

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 8
Дата публикации:: 17 ноября 2022 г.
Издание:: ISO IS 24048 edition 1 version 1
ICS:: 83.080.20

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Описание (английский):

This document specifies a method for the determination of bound acrylonitrile content in the continuous phase of acrylonitrile-butadiene-styrene (ABS) copolymer using Dumas combustion method. This document is applicable to ABS resin with a mass fraction of bound acrylonitrile content in continuous phase between 5 % and 50 %.

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты ISO

Overview

ISO 24048:2022 specifies a laboratory method for determining the bound acrylonitrile content in the continuous phase of acrylonitrile‑butadiene‑styrene (ABS) copolymer using the Dumas combustion method. Applicable to ABS resins with a continuous‑phase acrylonitrile mass fraction between 5 % and 50 %, the standard defines sample preparation, instrumental calibration, measurement and calculation steps for reliable acrylonitrile quantification.

Key topics and technical requirements

Principle: Dissolve/disperse ABS in acetone, separate continuous phase by high‑speed centrifugation, precipitate the continuous phase with cold methanol, wash with n‑hexane, dry and determine nitrogen via Dumas combustion; convert nitrogen to acrylonitrile content.

Sample preparation: Reflux dispersion in acetone, centrifuge at ≥ 18 000 r/min (keep centrifuge at 4 °C ± 0.1 °C), precipitate in methanol cooled to −10 °C, final specimen mass typically 50–100 mg (multiple precipitations can be combined).

Reagents: High‑purity solvents (acetone, methanol, n‑hexane) and reference combustible materials (e.g., acetanilide) for calibration.

Apparatus: Automatic Dumas analyser (combustion unit, oxygen feeder, reduction unit, absorber/separator, thermal conductivity detector), tin boats, centrifuge, vacuum oven (60 °C ± 1 °C, 1 kPa ± 0.5 kPa).

Calibration and quality control: At least 5 calibration points, linear regression with correlation coefficient ≥ 0.995, and a calibration factor maintained within 0.98 to 1.02; routine calibration before each batch.

Measurement parameters (recommended): combustion 900–1 050 °C, reduction 550–700 °C, oxygen and carrier gas pressures per instrument guidelines.

Precision and reporting: The standard includes sections on repeatability (r) and reproducibility (R) and an informative Annex A summarizing precision data. Test report contents are specified.

Practical applications

Quality control and verification of ABS resin formulation and batch consistency.

Routine laboratory testing in plastics manufacturing and inbound material inspection.

Research and development for polymer formulation and material characterization.

Regulatory or compliance testing where accurate acrylonitrile content in ABS continuous phase is required.

Failure analysis and supplier qualification.

ISO 24048:2022 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Practical applications

Who should use this standard

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