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Richard Storey

  • I am using a colorimetric method for measuring nitrate concentrations in streams. The final part requires the user to compare the colour that develops in the sample vial to a colour chart, but our volunteers don’t like the subjective nature of this last step. I am wondering whether a mobile phone could be used as a photometer to measure the light…[Read more]

  • Richard Storey became a registered member 6 years ago