关于醋酸纤维滤膜和聚碳酸酯滤膜测定营养盐和Chl a的对比  

Comparison between cellulose acetate membrane and polycarbonate membrane for the measurements of nutrients and chlorophyll a

作　　者：张云燕[1,2] 刘素美[1,2] 宋国栋[1,2] 

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/海洋科学与技术青岛协同创新中心,山东青岛266100 [2]海洋国家实验室海洋生态与环境科学功能实验室,山东青岛266100

出　　处：《海洋环境科学》2016年第6期932-937,共6页Marine Environmental Science

基　　金：国家自然科学基金项目(41376086;41521064);国家重点基础研究发展计划项目(2010CB428901);泰山学者工程专项经费项目

摘　　要：本论文采用聚碳酸酯滤膜(0.4μm)和国内测定营养盐常用的醋酸纤维滤膜(0.45μm)过滤不同站位海水样品测定营养盐和Chl a,探究两种滤膜之间的区别。营养盐的对比结果表明,采用未干燥的醋酸纤维滤膜和聚碳酸酯滤膜过滤的亚硝酸盐、铵氮、磷酸盐和硅酸盐均不存在显著性差异,硝酸盐存在显著性差异但差别小于2%,因而两种滤膜均适用于海水溶解态营养盐的过滤。干燥后的醋酸纤维滤膜过滤速度慢,且过滤过程中会引入较高的铵氮。Chl a的对比结果表明,聚碳酸酯滤膜更加适合Chl a的测定,醋酸纤维滤膜的截留效率明显低于聚碳酸酯滤膜,这可能是由于该滤膜无法完全截留小粒径的浮游植物。In this study,cellulose acetate membrane（ 0.45 μm） and polycarbonate membrane（ 0.4 μm） were compared by measuring nutrients in filtrates and chlorophyll a on the filters to explore the differences.Undried cellulose acetate membrane and polycarbonate membrane were both suitable for nutrients measurement with consistent results：there were no significant differences in nitrite,ammonium,dissolved phosphate and dissolved silicate between cellulose acetate membrane and polycarbonate membrane.The difference between these two membranes in nitrate was less than2%.Dried cellulose acetate membrane introduced more ammonium to seawater samples due to the slow filtration rate.Polycarbonate membrane was more suitable for the determination of chlorophyll a.The retention efficiency of cellulose acetate membrane tends to be lower since it cannot retain the pico-phytoplankton completely.

关 键 词：醋酸纤维滤膜 聚碳酸酯滤膜 营养盐 CHL a 

分 类 号：P734[天文地球—海洋化学]