What is BS EN ISO 5667-16:2014?

BS EN ISO 5667-16:2014 is a technical standard that provides guidelines and procedures for the sampling and preservation of water samples for chemical analysis. It focuses on collecting representative samples and maintaining their integrity during transportation and storage.

Sampling Techniques

The standard emphasizes the importance of using appropriate sampling techniques to ensure the accuracy and reliability of the collected samples. It covers various aspects, including sample location selection, sampling equipment sterilization, and sample volume determination.

Sampling locations should be chosen carefully to represent the water body correctly, considering factors such as depth, flow direction, and potential sources of contamination. Proper sterilization of sampling equipment helps prevent cross-contamination and ensures that the collected samples accurately reflect the desired parameters.

Preservation and Storage

After collection, it is crucial to preserve the water samples to prevent any chemical changes or degradation. BS EN ISO 5667-16:2014 provides recommendations for the use of appropriate preservatives based on the analytical methods used.

Adequate storage conditions are essential to maintain the integrity of the samples until the analysis takes place. Factors like temperature, light exposure, and duration of storage can affect the stability of the analytes. The standard offers guidance on suitable storage containers, preservation techniques, and storage durations for different types of water samples.

Quality Control and Analysis

To ensure the reliability of the obtained results, proper quality control measures must be implemented throughout the sampling and analysis process. BS EN ISO 5667-16:2014 outlines the importance of blank control samples, duplicate samples, and the use of certified reference materials.

The standard also highlights the need for analytical techniques with sufficient sensitivity and accuracy and recommends appropriate instrument calibration procedures. Regular performance checks, method validation, and adherence to laboratory quality assurance procedures are crucial for obtaining reliable analytical results.