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| An automated precise Winkler titration for determining dissolved oxygen on board ship |  |
| Furuya, K.; Harada, K. (1995). An automated precise Winkler titration for determining dissolved oxygen on board ship J. Oceanogr. 51(3): 375-383 |
| In: Journal of Oceanography: Tokyo. ISSN 0916-8370, meer |
| 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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