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首页> 外文期刊>Journal of oceanography >An automated precise Winkler titration for determining dissolved oxygen on board ship
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An automated precise Winkler titration for determining dissolved oxygen on board ship

机译:自动精确的Winkler滴定法测定船上的溶解氧

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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.
机译:提出了一种用于Winkler方法的自动滴定法,用于测量海洋中的初级生产力。该系统基于具有电位终点检测功能的微电脑控制的滴定仪。通过使用0.005-N的硫代硫酸钠滴定剂和旨在缩短测量时间的程序,该方法可在氧气浓度为六次的样品中获得0.04%的变异系数精度,范围为0.01至0.10% 70至250μM。测量一个样品大约需要四到五分钟。

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