ISO 9197:2016 PDF

Overview

ISO 9197:2016 - Paper, board and pulps: Determination of water‑soluble chlorides specifies an analytical method to quantify water‑soluble chloride ions in all types of paper, board and pulp. The standard defines sample preparation, extraction with cold water, measurement by ion chromatography and the way results are calculated and reported. The lower reporting limit of the method is 20 mg chloride ion per kilogram of dry sample.

Key topics and technical requirements

• Scope and limits: Applicable to all paper, board and pulps; lower determination limit 20 mg/kg (dry basis).
• Sampling & preparatory standards: Refers to ISO 186, ISO 7213 for sampling and ISO 287 / ISO 638 for dry matter determination.
• Extraction principle: Pieces of sample are disintegrated and extracted with cold water at room temperature; suspension is filtered and an aliquot analysed.
• Analytical technique: Chloride ion determination by ion chromatography (conductivity detector); calibration with a five‑point chloride series (example 1–10 mg/L).
• Reagents & water quality: Use distilled/demineralized water with conductivity