pH has been determined in some lakes by using an in situ technique. pH has also been measured in the usual way in the field and in the laboratory. These measurements, together with the determinations in situ, made it possible to get information about changes of pH in the water samples during sampling, measuring, and storage. The microstratification of pH has also been investigated by means of in situ determinations.
OLAV GRÖTERUD; IN SITU DETERMINATIONS OF pH IN SOME LAKES. Hydrology Research 1 June 1971; 2 (3): 133–145. doi: https://doi.org/10.2166/nh.1971.0009
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