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Video: How we analyse our soil samples
In my blog-post from February I showed how we take soil samples. Here is how we measure them:
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Autosampler for Isotopes
After multiple iterations, the autosampler finally works. While I assembled the hardware, Stefan Seeger did all the software programming and designed the PCBs. Our System currently has the capacity to load 46 sample bags. The samples are each pricked with a cannula which is connected to a valve. The valves can individualy be opened, allowing…
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Water Stable Isotope Measuring
After taking over 700 soil samples in the Freiburg fieldcampaign, I am now analyzing the soil water stable isotope composition. Therefore the sample bags are inflated with dried air and heat sealed. After 48 hour equilibration time, each bag gets tested. Therefore, the bags are pricked with a needle and tube, leading to a PICARRO…