海水样品保存条件对CODMn测定的影响

Research on Effect of Storage Factors on CODMn in Sea Water

化学需氧量(CODMn)是表示海水中还原性物质多少的一个指标,主要反映海水受有机物污染的程度。在海洋环境监测中是一个重要的评价因子,是评价海水水质优劣的重要指标之一。不同的保存条件对CODMn值的影响很大,本文探究了不同的固定剂(硫酸、二氯甲烷和甲醛)在冷藏和冷冻条件下对CODMn值具体的影响情况,从而给出海水样品化学需氧量的最佳短期保存技术和保存时间。

Chemical Oxygen Demand(CODMn)is an indicator of to measure how many reducing substances are contained in sea water.It is mainly used to reflect the pollution degree of the organic materials in the sea.It is an important evaluation factor in ocean environment monitor and is an important index to assess the ocean water quality.Different storage conditions will create obviously different influence on the CODMn value.In this essay,the influence of different fixatives(sulfuric acid,dichloromethane and formaldehyde)on CODMn value under the refrigeration and freezing conditions is studied so as to work out the the best short-term storage technology and the best storage time for the CODMn in sea water.