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- W2380409919 abstract "Iridium oxide and tungsten oxide pH microelectrodes were fabricated by oxidizing the metal wires in sodium carbonate or lithium carbonate molten at high temperature.Experiments were carried out to characterize their working performance.The microelectrodes show good linear response to pH in buffer solution with a slope between 40 and 60 mV/pH,close to Nernst slope.Experimental results indicate that iridium oxide microelectrode has better performance than tungsten oxide microelectrode in long-time working stability.Iridium oxide microelectrode has a 90% response time of about 5 s,shorter than that of tungsten oxide microelectrode.Iridium oxide microelectrode is little affected by oxygen concentration,salinity,and the reducing agent of S2-ions in the pore water of sediments after being coated with a Nafion film.Iridium oxide microelectrodes were applied to measure pH profiles of sediment cores sampled from Xiamen Western Bay and Jiulong River Estuary.It was found that pH reach minimum values at oxic-anoxic interface of 4～5 mm depths within the sediments and tended to be stable at depths deeper than 20 mm.These results agree with the prediction of biogeochemistry in coastal sediments." @default.
- W2380409919 created "2016-06-24" @default.
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- W2380409919 date "2009-01-01" @default.
- W2380409919 modified "2023-09-23" @default.
- W2380409919 title "Development of Metal Oxide Microelectrodes for Measuring Sediment pH" @default.
- W2380409919 hasPublicationYear "2009" @default.
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