海水样品保存条件对氮营养盐测定的影响

Research on Effect of Preservation Methods on Nitrogen in Sea Water

海洋中的氮是浮游植物赖以生存的营养元素,在生物生产活动中起重要作用,初级生产力通常以氮化合物的数量和质量为基础,因此氮是海洋浮游植物生长的限制性因子。在海洋环境监测中无机氮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。不同的保存条件对氮营养盐含量的影响很大,本文探究了硫酸、二氯甲烷和甲醛在冷藏和冷冻条件下对氮营养盐含量的影响情况,从而给出海水样品氮营养盐的最佳短期保存技术和保存时间。

Nitrogen is the nutrient element on which phytoplankton survives and plays a vital role in biological production activities in sea water.Primary productivity is usually premised on the quantity and quality of nitrogen compounds,so nitrogen is the limiting factor for the growth of marine phytoplankton.Inorganic nitrogen is a vital evaluation factor in marine environmental monitoring as well as one of the significant indicators for evaluating the quality of seawater.Different preservation conditions will exert tremendously different influences on the content of nitrogen nutrients.In this thesis,the effects of sulfuric acid,methylene chloride and formaldehyde on the content of nitrogen nutrients under refrigeration and freezing conditions are specially investigated so as to identify the best short-term preservation technology and preservation time of nitrogen nutrients in seawater samples.