As part of the Tellus geochemical surveys in 2012 and 2016, 6836 stream water samples were collected and tested for their chemical content. Since then, the water samples have been stored in an archive so that they can be used again in future studies. How the water is preserved and stored is very important, as the chemical make-up of water can change over time. In this study, the chemistry of 100 of these water samples was rechecked to see if any change had taken place. This will help us to confirm that the samples can still be used for further research.
The report can be viewed here (PDF).
The data is available here (excel).