• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Estuarine Coastal and Shelf Science >Assessment of the suitability of Durafet-based sensors for pH measurement in dynamic estuarine environments
【24h】

Assessment of the suitability of Durafet-based sensors for pH measurement in dynamic estuarine environments

机译：评估基于Durafet的传感器在动态河口环境中进行pH测量的适用性

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The suitability of the Honeywell Durafet to the measurement of pH in productive, high-fouling, and highly-turbid estuarine environments was investigated at the confluence of the Murderkill Estuary and Delaware Bay (Delaware, USA). Three different flow configurations of the SeapHOx sensor equipped with a Honeywell Durafet and its integrated internal (Ag/AgCl reference electrode containing a 4.5 M KCl gel liquid junction) and external (solid-state chloride ion selective electrode, CI-ISE) reference electrodes were deployed for four periods between April 2015 and September 2016. In this environment, the Honeywell Durafet proved capable of making high-resolution and high-frequency pH measurements on the total scale between pH 6.8 and 8.4. Natural pH fluctuations of 1 pH unit were routinely captured over a range of timescales. The sensor pH collected between May and August 2016 using the most refined SeapHOx configuration exhibited good agreement with multiple sets of independently measured reference pH values. When deployed in conjunction with rigorous discrete sampling and calibration schemes, the sensor pH had a root-mean squared error ranging between 0.011 and 0.036 pH units across a wide range of salinity relative to both pH(T) calculated from measured dissolved inorganic carbon and total alkalinity and pH(NBs) measured with a glass electrode corrected to pH(T) at in situ conditions. The present work demonstrates the viability of the Honeywell Durafet to the measurement of pH to within the weather-level precision defined by the Global Ocean Acidification Observing Network (GOA-ON, = 0.02 pH units) as a part of future estuarine CO2 chemistry studies undertaken in dynamic environments. (C) 2017 Elsevier Ltd. All rights reserved.
机译：在默德基尔河口和特拉华湾（美国特拉华州）的交汇处，研究了霍尼韦尔·杜拉夫特在生产性，高污染性和高浊度河口环境中对pH值测量的适用性。配备霍尼韦尔·杜拉夫特（Honeywell Durafet）及其集成的内部（含4.5 M KCl凝胶液接点的Ag / AgCl参比电极）和外部（固态氯离子选择性电极，CI-ISE）参比电极的SeapHOx传感器的三种不同流量配置为在2015年4月至2016年9月之间进行了四个周期的部署。在这种环境下，霍尼韦尔Durafet被证明能够在pH 6.8至8.4的总范围内进行高分辨率和高频pH测量。通常在一段时间范围内捕获大于1个pH单位的自然pH波动。使用最精细的SeapHOx配置在2016年5月至2016年8月之间收集的传感器pH与多组独立测量的参考pH值显示出良好的一致性。当与严格的离散采样和校准方案结合使用时，相对于根据测量的溶解无机碳和总pH计算出的pH（T），传感器的pH值在广泛盐度范围内的均方根误差在0.011至0.036 pH单位之间用原位条件下校正为pH（T）的玻璃电极测量碱度和pH（NBs）。目前的工作证明了霍尼韦尔·杜拉夫特（Honeywell Durafet）在全球海洋酸化观测网络（GOA-ON，<= 0.02 pH单位）所定义的天气水平精度范围内进行pH测量的可行性，这是未来河口二氧化碳化学研究的一部分在动态环境中进行。 （C）2017 Elsevier Ltd.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号