ISO 10304-3-1997 PDF

Full title and description

ISO 10304-3:1997 — Water quality — Determination of dissolved anions by liquid chromatography of ions — Part 3: Determination of chromate, iodide, sulfite, thiocyanate and thiosulfate. This International Standard specifies ion‑chromatographic procedures and related sample pretreatment and detection techniques for the quantitative determination of selected dissolved anions in water.

Abstract

Part 3 of ISO 10304 gives validated procedures for measuring chromate, iodide, sulfite, thiocyanate and thiosulfate in aqueous samples using liquid ion‑exchange chromatography (ion chromatography). The standard describes appropriate sample preparation (for example filtration and dilution), recommended detector types (conductimetric, UV and amperometric where applicable), calibration, typical working ranges and considerations for avoiding or accounting for interferences. It provides performance characteristics and guidance for quality control to ensure reliable routine and reference measurements in water and wastewater matrices.

General information

• Status: Published; confirmed by ISO review and currently maintained.
• Publication date: August 1997 (1997-08).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 13.060.50 (Examination of water for chemical substances).
• Edition / version: Edition 1 (1997).
• Number of pages: 22 pages.

Scope

This part of ISO 10304 specifies methods for the determination of dissolved anions — specifically chromate (CrO4 2−), iodide (I−), sulfite (SO3 2−), thiocyanate (SCN−) and thiosulfate (S2O3 2−) — in natural, drinking and waste waters using liquid ion chromatography. It covers recommended chromatography conditions, detectors, sample pretreatment and calibration approaches sufficient to obtain routine quantitative results in the working ranges indicated in the standard. It does not cover speciation beyond the listed anions or methods not based on liquid ion‑exchange chromatography.

Key topics and requirements

• Defined target analytes: chromate, iodide, sulfite, thiocyanate and thiosulfate.
• Sample pretreatment: filtration, optional preservation and dilution procedures to bring concentrations into working ranges.
• Chromatographic separation: recommended ion‑exchange columns, eluents and gradient/ isocratic conditions appropriate for anion separation.
• Detection options: conductimetric detection as primary method, with UV and amperometric detection options where applicable for improved selectivity or sensitivity.
• Calibration and quantification: preparation of calibration standards, linearity checks and use of external calibration curves.
• Performance characteristics: guidance on working ranges, limits of detection/quantification, repeatability and recovery expectations.
• Interference management: identification of common interfering species and recommended measures (e.g., matrix dilution, suppression, alternate detectors) to mitigate their effects.
• Quality assurance: procedural blanks, control samples, spiked recoveries and routine instrument checks to verify ongoing method performance.
• Reporting: recommended units, detection limits, uncertainty statements and any deviations from the specified procedure.

Typical use and users

ISO 10304-3:1997 is intended for environmental and water testing laboratories performing routine monitoring and regulatory testing of surface, groundwater, drinking and wastewater. Typical users include municipal and industrial water laboratories, contract testing laboratories, environmental monitoring agencies, research institutions and manufacturers of ion‑chromatography instrumentation developing validated analytical methods.

Related standards

Related documents include other parts of the ISO 10304 series (for example Part 1 covering bromide, chloride, fluoride, nitrate, nitrite, phosphate and sulfate) and earlier/related national and EN implementations. Laboratories applying this method commonly reference sampling and handling standards (for example ISO standards on water sampling) and general laboratory competence standards such as ISO/IEC 17025 for method validation and quality management.

Keywords

ion chromatography, anions, water quality, chromate, iodide, sulfite, thiocyanate, thiosulfate, conductimetric detection, UV detection, amperometric detection, ISO 10304

FAQ

Q: What is this standard?

A: ISO 10304-3:1997 is an International Standard that specifies ion‑chromatographic methods for determining specific dissolved anions (chromate, iodide, sulfite, thiocyanate and thiosulfate) in water.

Q: What does it cover?

A: It provides procedures for sample pretreatment, chromatographic separation, detector selection (conductimetric, UV, amperometric), calibration, performance characteristics (limits, precision) and quality control for the listed anions in water matrices.

Q: Who typically uses it?

A: Environmental and water testing laboratories, regulatory bodies, research institutes and instrument manufacturers use the standard for routine monitoring, compliance testing and method development.

Q: Is it current or superseded?

A: The original publication date is August 1997 (Edition 1). The standard has been subject to periodic ISO review; it has been confirmed through review and remains a current published standard in the ISO catalogue (confirmed in ISO systematic reviews).

Q: Is it part of a series?

A: Yes. ISO 10304 is a multi‑part series covering the determination of dissolved anions by liquid chromatography of ions. Other parts address additional anions and matrix‑specific methods.

Q: What are the key keywords?

A: Ion chromatography, anions, water quality, chromate, iodide, sulfite, thiocyanate, thiosulfate, conductimetric detection, ISO 10304.