Water sampling for gas analyses

For these analyses a particularly complex sampling technique and a careful approach are required so that on the one hand dissolved gases or freely rising gases cannot escape, and on the other hand no secondary change in the gas composition can take place due to the air. Besides the glass 

7) = lateral tube at top with silicone membrane 8) = tele-scopic overflow pipe for the water 9) = gas-water inlet 10) = water drainage (from Fresenius, Fresenius, Schneider) 

For extracting gases from gas-retaining water samples see the authors tried and tested device (Fig. 5). 

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