In Instance 33:38, Aleksi Pienimaki asks about the possible use of conductivity measurements to monitor the progress of iron desalination treatments in alkaline solutions.
Unfortunately it is not possible to distinguish the contribution to the conductivity of the solution due to chloride ions from that due to all the other ions in solution. However, in the 1970s and 80s I did experiment with using selective ion electrodes to measure the amount of chloride in desalination tanks. The electrodes available at that time were not sensitive enough and did not function well in the presence of large amounts of OH- ions (high pH). However, I think modern electrodes are much more sensitive and can work well at high pH - I would recommend this approach. Do contact me off-line if you would like to discuss this further. Barry Knight Formerly at the Ancient Monuments Laboratory, English Heritage ****** Unsubscribe by sending a message to [email protected] Searchable archives: http://cool.conservation-us.org/byform/mailing-lists/cdl/
