I am trying to build a device which can collect the groundwater flux that comes to a ditch/small river. The main idea is to measure the N2 gas concentration in that water flux, so, I need to avoid the loss of gas in the collected samples.
To construct a seepage water collector for measuring N₂ gas without loss, use a gas-tight chamber such as a buried funnel or pipe placed in the sediment to capture groundwater flow. Connect this chamber to a sealed collection bottle using airtight tubing to prevent gas exchange. To extract samples, use a syringe with a 3-way valve or transfer water directly into vacuum-sealed vials, ensuring minimal air contact. Before collecting, fill all tubing with water to remove air bubbles, and transfer samples gently to avoid turbulence that could release dissolved gases. This setup helps preserve the N₂ concentration for accurate analysis.
you can dig a soil profilre and then dig a cave, and then use film to colect Seepage water
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