基于三电极复合探头的氨氮在线测量  

ONLINE METHOD OF MEASURING AMMONIA-NITROGE IN THE OCEAN USING THREE-ELECTRODE COMBINED PROBE

作　　者：刘文耀[1] 郑伟[1] 孙振东[1] 姜泓[1] 王香然[1] 陈晓晴[1] 王金涛[1] 

机构地区：[1]教育部天津大学光电子科学技术重点实验室天津大学,天津300072

出　　处：《天津大学学报（自然科学与工程技术版）》2001年第2期133-136,共4页Journal of Tianjin University：Science and Technology

基　　金：国家 8 63- 81 8主题资助项目 !(863- 81 8- 0 1 - 0 1 - 0 3)

摘　　要：介绍一种在海洋中在线测量氨氮含量的检测方法 ,同时测量出 p NH3、p H及温度 T,求得海水中氨与铵离子共存的比例 ,即氨的离解度 [NH3]/ [NH+ 4]进而得到总氨、氨氮及铵氮含量 .还介绍了作者研制的由 p NH3、p H和温度 T电极集成的复合探头 .实验结果表明p NH3的测量精度为 p NH3± 0 .0 3,[NH3- N]及 [NH+ 4- N]精度相对误差 10 %An online method of measuring ammonia-N concentration in the ocean is presented in the paper.Using this method such parameters as pNH 3,pH and water temperature T can be measured simultaneously;then the dissociation of Ammonia, [NH 3]/[NH + 4],is calculated then;and finally [NH 3], and are all obtained.The three-electrode combined probe,NH 3/pH/T,developed in our lab is used in this measurement.The results show that the accuracy of pNH 3 is pNH 3±0.03,and the relative error of and is less than 10%.

关 键 词：氨氮化学传感器 靛酚蓝光谱法 现场测量 海洋 氨氮含量 三电极复合探头 离解度 

分 类 号：P734.44[天文地球—海洋化学]