河水溶解无机营养盐样品保存与过滤方式对其测定的影响:以黄河水为例  

Effects of storage and filtration methods of riverine dissolved inorganic nutrients on their determination: a case study of the Yellow River water sample

作　　者：张红梅[1,2] 刘素美 宋国栋[1,2] 丁帅 ZHANG Hong-mei;LIU Su-mei;SONG Guo-dong;DING Shuai(Key Laboratory of Marine Chemistry Theory and Technology,Ministry of Education Institute for Advanced Occan Study,Ocean University of China,Qingdao 26600,China;Laboratory for Marine Ecology and Environmental Science,Qingdao National Laboratory for Marine Science and Technology,Qingdao 266237.China)

机构地区：[1]中国海洋大学海洋化学理论与工程技术教育部重点实验室/海洋高等研究院,山东青岛266100 [2]青岛海洋科学与技术国家实验室海洋生态与环境科学功能实验室,山东青岛266237

出　　处：《海洋环境科学》2020年第4期638-645,共8页Marine Environmental Science

基　　金：国家重点研发计划项目(2016YFA0600902);NSFC–山东联合基金(U1806211);山东省“泰山学者”工程专项经费资助项目。

摘　　要：对营养盐样品的及时预处理及恰当的保存是保证数据真实可靠的前提条件。本文以高浊度的黄河为例,探究了硅酸盐样品冷冻保存与加氯化汞常温保存两种方法之间的区别,结果表明两种方法不存在显著性差异。通过对比现场过滤冷冻保存于9 mL真空涤纶树脂(PET)管与延迟过滤冷冻保存于125 mL高密度聚乙烯(HDPE)瓶中两种营养盐样品预处理方法,探讨了延迟过滤时间对营养盐测定的影响,发现亚硝酸盐、硝酸盐、磷酸盐未受到过滤时间延长的影响,铵盐因过滤时间延长受到悬浮颗粒物和浮游植物的影响而结果偏低11%~46%,硅酸盐存在差异可能是由储存容器和体积的不同引起,而非过滤时间延长导致。Timely pretreatment and proper storage of nutrient samples are the pre-conditions to ensure the reliability of data. In this study, we examine the differences between frozen storage and preservation with mercury chloride at room temperature for dissolved silicate in the Yellow River water sample that is characterized of high turbidity. We found out that there was no significant difference between the two storage methods. We compared in-situ filtration(freezing stored in 9 mL vacuum polyethylene terephthalate tube) and delayed filtration(freezing stored in 125 mL high density polyethylene bottle) for the nutrients, and discussed the effects of delayed filtration time on nutrients data quality. Nitrite, nitrate and phosphate were not affected by prolonged filtration time, while ammonium was significantly impacted by a decrease of 11%~46%, possibly due to suspended particulate matter adsorption and/or phytoplankton assimilation. As for silicate, storage container and its volume may play a major role in silicate storage while the prolongation of filtration time is much less important.

关 键 词：现场过滤 延迟过滤 营养盐 黄河 

分 类 号：X142[环境科学与工程—环境科学]