scope:

This part of ISO 5667 establishes general principles for sampling, preservation, handling, transport and storage of all water samples including those for biological analyses, but not those intended for microbiological analysis, ecotoxicological assays and passive sampling as described in the scope of ISO 5667-23. This standard is particularly appropriate when spot or composite samples cannot be analyzed on site and have to be transported to a laboratory for analysis. The preservation techniques specified in this International Standard are applicable if there are no contradictory requirements concerning the preservation of samples in the analytical method intended to be carried out after the completion of the procedures described. Differing preservation requirements of analytical methods may be tailored to the particular requirements of the specific analytical method. Contradictory requirements shall be the result of changes in analytical techniques and standards The reason for particular deviation shall be noted in the most recent analytical method standard.