Abstract
An automated titration for the Winkler method is presented for measuring primary productivity in the ocean. The system is based on a microcomputer-controlled titration with potentiometric endpoint detection. By the use of 0.005-N sodium thiosulfate as a titrant and a program designed to shorten the time for measuring, the method achieves a precision of 0.04% coefficient of variation with a range of 0.01 to 0.10% for six replicates of samples at oxygen concentration of 70 to 250 μM. It takes about four to five minutes to measure one sample.
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Furuya, K., Harada, K. An automated precise Winkler titration for determining dissolved oxygen on board ship. J Oceanogr 51, 375–383 (1995). https://doi.org/10.1007/BF02285173
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DOI: https://doi.org/10.1007/BF02285173