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YSD-COD-Ⅲ型COD在線水質分析儀

堿性加熱條件下，高錳酸鉀氧化海水中的需氧物質；酸性條件下，碘化鉀還原過量的高錳酸鉀和 生成的二氧化錳；硫代硫酸鈉標準溶液滴定生成的游離碘，采集反應液圖像并根據RGB值的變化， 判定滴定的終點。

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