基于光度法的高精度海水pH值测量系统

引用本文: 曹璐, 王小红, 张云燕, 王昭玉, 褚东志, 马然. 基于光度法的高精度海水pH值测量系统[J]. 分析化学, 2017, 45(3): 331-335. doi: 10.11895/j.issn.0253-3820.160758 shu

Citation: CAO Lu, WANG Xiao-Hong, ZHANG Yun-Yan, WANG Zhao-Yu, CHU Dong-Zhi, MA Ran. A Spectrophotometric System for High Precision Measurement of pH of Seawater[J]. Chinese Journal of Analytical Chemistry, 2017, 45(3): 331-335. doi: 10.11895/j.issn.0253-3820.160758 shu

基于光度法的高精度海水pH值测量系统

山东省科学院海洋仪器仪表研究所, 山东省海洋环境监测技术重点实验室, 青岛 266061
基金项目:
本文系国家重点研发计划(No.2016YFC1400804)，山东省自然科学基金(No.ZR2016DM17)，山东省科技发展计划(No.2014GGX103003)和山东省优秀中青年科学家科研奖励基金(No.BS2014HZ015)资助

摘要: 基于光度法的海水pH值自动测量系统测定速度快，精密度高，是海洋酸化和碳循环研究急需的测量装置。本研究以光度法和流动注射分析技术为基础，通过整合泵阀流路体系、LED光源、流通池和光谱仪，研发了海水pH值自动测量系统。本系统在分析过程中不易产生气泡，利用指示剂在样品中的浓度变化校正指示剂的加入带来的测量偏差，操作简单方便，测量一个样品用时约为1.5min，精密度为0.0013，准确度为0.0059，可在实验室或调查船中对所采集的海水快速地进行高精度pH值测量。

关键词:

English

A Spectrophotometric System for High Precision Measurement of pH of Seawater

Shandong Provincial Key Laboratory of Ocean Environment Monitoring Technology, Shandong Academy of Sciences Institute of Oceanographic Instrumentation, Qingdao 266001, China
Received Date: 14 October 2016
Revised Date: 09 January 2017
Fund Project:
This work was supported by National Key Research and Development Plan (No. 2016YFC1400804), Natural Science Foundation of Shandong Province (No. ZR2016DM17), Science and Technology Plan of Shandong Province (No. 2014GGX103003) and Shandong Outstanding Young Scientist Award Fund (No.BS2014HZ015)

Abstract: Spectrophotometric seawater pH measurement system is an urgent need of device due to its quick speed and high precision. Based on spectrophotometric method and flow injection analysis technique, an automated system for pH measurement of seawater was developed by integrating pump and valve flow path, LED light source, flow cell and spectrophotometer. This measurement system effectively avoided bubbles. The indicator of concentration gradient in the seawater sample was used to correct for the pH perturbation caused by the indicator, thus the operation of system was simple and convenient. With this system, only 1.5 min was needed for a sample measurement with a precision of 0.0013 pH units and an offset of 0.0059 pH units. This system could be used for the rapid determination of pH of seawater collected by laboratory or research ship with high precision pH values.

Key words:

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基于光度法的高精度海水pH值测量系统

English

A Spectrophotometric System for High Precision Measurement of pH of Seawater

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

基于光度法的高精度海水pH值测量系统

English

A Spectrophotometric System for High Precision Measurement of pH of Seawater

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

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CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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