During three days we had a service engineer working on one of our mass spectrometers, the Orbitrap that Maria is the main user of. Not that anything was broken, but it was time for the yearly service (the instrument was installed 10 months ago). Maria kept following the engineer about all the steps he did. Interesting to see when he took apart some parts of the instrument (liquid pumps, instrument interface etc), and at the meantime try to learn how to do smaller repairs. He didn't do anything with the most advanced/expensive parts, meaning the internal mass analyzers, these you probably you do more harm than good if you touch.
Afterwards we hope the sensitivity will be higher than before. One way to decrease the background noise, would be to clean the solution bottles and put newly prepared solutions.
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