连华cod氨氮双参数测定仪可打印5B-6C100
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连华cod氨氮双参数测定仪可打印5B-6C100功能特点:
![](https://img.alicdn.com/imgextra/i2/1897745395/TB2m5IWXmtYBeNjSspkXXbU8VXa_!!1897745395.jpg)
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5B-6C100技术参数:
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COD(Chemical Oxygen Demand)中文名称化学需氧量,是以化学方法测量水样中需要被氧化的还原性物质的量。COD是指标水体有机污染的一项重要指标,能够反应出水体的污染程度。
氨氮是指水中以游离氨(NH3)和铵离子(NH4+)形式存在的氮。动物性有机物的含氮量一般较植物性有机物高。同时,人畜粪便中含氮有机物很不稳定,容易分解成氨。因此,水中氨氮含量增高时是指以氨或铵离子形式存在的化合氨。