Overview
SIST EN ISO 5667-3:2024 - Water Quality Sampling: Preservation and Handling of Water Samples is the authoritative international standard for ensuring the integrity and reliability of water sample analyses. Published by the Slovenian Institute for Standardization (SIST) and identical to EN ISO 5667-3:2024 and ISO 5667-3:2024, this standard specifies essential requirements for the preservation, handling, transport, and storage of water samples. It applies to samples taken for physicochemical, chemical, hydrobiological, microbiological, and radiochemical analyses, ensuring accurate and comparable results, especially when analysis cannot occur at the sampling site and laboratory transport is necessary.
Key Topics
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Sampling Program Design
Reference is made to ISO 5667-1 for the design and implementation of effective sampling programs, including sampling techniques suitable for various water matrices.
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Sample Preservation and Handling
Critical procedures for preserving physicochemical, chemical, hydrobiological, microbiological, and radiochemical water samples are detailed to prevent changes that could compromise analysis results. Specific reagents, preservation methods, and validated procedures are highlighted for different analyte groups.
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Choice and Preparation of Containers
Guidance is provided for selecting and preparing appropriate sample containers to maintain analyte stability and avoid cross-contamination. Sterility and material compatibility are essential, especially for microbiological and trace metals analysis.
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Transport and Storage
Best practices for sample cooling, freezing, labelling, and documentation are covered, supporting the maintenance of sample integrity during transportation and storage before laboratory analysis.
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Chain of Custody and Documentation
Emphasis is placed on thorough sample tracking, from collection, through transport, to laboratory receipt, ensuring transparency and traceability throughout the sample’s lifecycle.
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Method Validation and Storage Time
The standard references ISO/TS 5667-25 for validating sample storage times and preservation conditions, reinforcing the importance of method validation to support data quality.
Applications
SIST EN ISO 5667-3:2024 is widely used by professionals and organizations involved in:
- Drinking Water Quality Monitoring
Ensuring that collected samples accurately represent source and supplied water conditions.
- Environmental and Regulatory Compliance
Supporting wastewater, surface water, and groundwater monitoring in line with national and international environmental regulations.
- Laboratory Analysis
Guaranteeing that water samples received for physical, chemical, biological, or radiochemical analysis are preserved and handled according to best practice, thus minimizing sample degradation.
- Industrial Water Management
Maintaining the reliability of water sampling in industries where water quality affects processes, safety, and compliance.
- Research and Public Health
Facilitating robust, reproducible results in water quality research projects and safeguarding public health through accurate monitoring.
Related Standards
- ISO 5667-1: Water quality - Sampling - Part 1: Guidance on the design of sampling programmes and sampling techniques
- ISO/TS 5667-25: Water quality - Guidance on validation of storage times of water samples
- ISO 19458: Water quality - Sampling for microbiological analysis
- ISO 5667-16: Water quality - Sampling - Part 16: Guidance on biotesting (biological assays)
- ISO 5667-23: Water quality - Sampling - Part 23: Guidance on passive sampling
- ISO 5667-27: Water quality - Sampling - Part 27: Guidance on the sampling of microplastics
- ISO 17034: General requirements for the competence of reference material producers
Practical Value
By adopting SIST EN ISO 5667-3:2024, organizations can:
- Ensure data reliability by preserving the physical, chemical, and biological characteristics of water samples from collection to analysis
- Meet international regulatory and accreditation requirements for water quality monitoring
- Improve traceability and reduce the risk of sample contamination or degradation
- Enhance comparability and reproducibility of analysis results across laboratories and jurisdictions
- Support efforts in public health, environmental protection, and industrial quality assurance by implementing unified and validated procedures
Keywords: water quality, water sampling, sample preservation, sample handling, laboratory analysis, ISO 5667-3, water sample storage, transport of water samples, water analysis standard, environmental monitoring.