丰水期地表河流水中泥沙沉降时间对总磷样品测定结果的影响分析

地表河流水中总磷含量高低是评定水质优劣的一项重要指标，分析数据表明丰水期中总磷主要来源于泥沙中吸附的有机磷和无机磷；水样中总磷含量随着泥沙沉降时间的延长而逐渐降低。因此样品采集回来后，样品的泥沙沉降时间是影响地表河流中总磷测定结果的一个主要原因。

Analysis on Impact on Determination Results of Total Phosphorus by Sedimentation Time of the Sediments in River during High Water Period

The phosphorus content is an important indicator of water quality. The main sources of total phosphorus in the rainy period come from the sediments in the adsorption of organic phosphorus and inorganic phosphorus. A trend of decreasing phosphorus content with longer sedimentation time is revealed. So the main factor of influencing the determination results is focused on the sedimentation time of the sediments of the samples in the lab.