摘要
采用三个夹管电磁阀联用代替传统六通阀的样品定量方法,自制一套多通道流动注射分光光度分析仪,并优化仪器的最佳测试条件,实现了海水中总溶解氮含量的测定。本分析系统结构简单,操作方便,测定频率为27个.h-1。测试结果表明,总溶解氮的线性范围分别为50.0～1 000.0μgN.L-3(r≥0.999),检出限为7.6μgN.L-3。加标回收率为87.3～107.2%,RSD为1.35～6.32%(n=6)。经t检验分析,本方法与国标方法测定数据不存在显著性差异,可适用于海水中总溶解氮快速测定分析。
Using three pipe clamp solenoid valves to replace the traditional six-port valv e for sample quota,a set of multi-channel flow injection analyzer was designed in the present paper.The authors optimized optimum instrumental testing condit ion,and realized determination and analysis of total dissolved nitrogen in seaw aters.The construction of apparatus is simple and it has the potential to be us ed for analysis of total dissolved nitrogen.The sample throughput of total diss olved nitrogen was 27 samples per hour.The linear range of total dissolved nitr ogen was 50.0～1 000.0 μgN·L-3（r≥0.999）.The detection limit was 7.6 μgN·L-3.The recovery of total dissolved nitrogen was 87.3%～107. 2%.The relative standard deviation for total dissolved nitrogen was 1.35%～6.32%（n=6）.After the t-test analysis,it does not have the significa nce difference between this method and national standard method.It is suitable for fast analysis of total dissolved nitrogen in seawater.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2012年第1期219-222,共4页
Spectroscopy and Spectral Analysis
基金
国家高技术研究发展计划(863计划)项目(2006AA09Z167)
国家海洋局第一海洋研究所基本科研业务费专项项目(2010G14)
国家海洋局海洋赤潮灾害立体监测技术与应用重点实验室基金项目(MATHAB200913)资助
关键词
夹管电磁阀
流动注射分析
总溶解氮
Pipe clamp solenoid valves
Flow injection analysis
Total dissolved nitrogen
