Water Quality - Sampling - Part 3: Guidance on the Preservation and Handling of Samples (ISO 5667-3 : 1994)

This document outlines the procedures for the preservation and handling of water samples, ensuring that collected data accurately reflects the water quality at the time of sampling. It addresses the critical need to maintain sample integrity during storage and transportation by providing specific guidelines on container materials, filling techniques, and the use of preservatives where necessary. The guidance covers various sample types, including those requiring temperature control, protection from light, or chemical stabilization to prevent biological or chemical changes. By establishing consistent protocols, this standard supports the reliability of environmental monitoring and laboratory analysis across different regions and stakeholders. It offers detailed information on labeling, storage conditions, and maximum holding times for specific analytes, helping practitioners minimize errors introduced during the sampling process. Adherence to these recommended practices facilitates the comparability of results obtained from different sources and supports effective water resource management and regulatory compliance efforts worldwide.