The concentration of the preservative solution can be very high if soil solution volume collected is very low. In the case of a strong acid solution, it can affect biogeochemical processes in the sample.
What kind of lysimeter? Lysimeter choice opens a wide range of critisism with regards to whether the sample is truely representative of the soil solution.
well it really depends on what you want to learn. If you want to study leaching of pesticides, you might be temted to use sodium azide, which often works fine. as long as one is aware that the azide ion occasionally reacts with the compounds of quesion and is aware it is pretty toxic thus one can only use it if 100% sure the public (children) cannot access your lysimeter.
Of course IF it is possible to collect samples on a daily basis this is VERY much preferred.
Wow, this is really a wide topic and not that simple. My remark to the first answer, see the following literature: WEIHERMÜLLER, L., et al. In situ soil water extraction: A review. Journal of environmental quality, 2007, 36. Jg., Nr. 6, S. 1735-1748.
- Badges
- Science topic
- Similar topics
- Geoscience
- Hydrology