A long-term in situ calibration system for chemistry analysis of seawater

Chun Yang Tan; Bo Jin; Kang Ding; William E. Seyfried; Ying Chen

doi:10.1631/jzus.A0900643

A long-term in situ calibration system for chemistry analysis of seawater

Chun Yang Tan, Bo Jin, Kang Ding, William E. Seyfried, Ying Chen

Earth and Environmental Sciences-Twin Cities

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

An in situ calibration system is a versatile exploration instrument for electrochemical sensors investigating the biochemical properties of the marine environment. The purpose of this paper is to describe the design of an auto-calibrating system for electrochemical (pH) sensors, which permits two-point in situ calibration, suitable for long-term measurement in deep sea aqueous environments. Holding multiple sensors, the instrument is designed to perform long-term measurements and in situ calibrations at abyssal depth (up to 4000 m). The instrument is composed of a compact fluid control system which is pressure-equilibrated and designed for deep-sea operation. In situ calibration capability plays a key role in the quality and reproducibility of the data. This paper focuses on methods for extending the lifetime of the instrument, considering the fluidics design, mechanical design, and low-power consumption of the electronics controller. The instrument can last 46 d under normal operating conditions, fulfilling the need for long-term operation. Data concerning pH measured during the KNOX18RR cruise (Mid-Atlantic Ridge, July-August, 2008) illustrate the desirable properties of the instrument. Combined with different electrodes (pH, H₂, H₂S, etc.), it should be of great utility for the study of deep ocean environments, including water column and diffuse-flow hydrothermal fluids.

Original language	English (US)
Pages (from-to)	701-708
Number of pages	8
Journal	Journal of Zhejiang University: Science A
Volume	11
Issue number	9
DOIs	https://doi.org/10.1631/jzus.A0900643
State	Published - Sep 2010

Bibliographical note

Funding Information:
‡ Corresponding author * Project supported by National Natural Science Foundation of China (No. 40637037), the National High-Tech Research and Development Program (863) of China (No. 2007AA091901), the National Science Foundation of U.S. (No. 0525907), and the China Scholarship Council (No. 2009632124) © Zhejiang University and Springer-Verlag Berlin Heidelberg 2010

Funding Information:
Sea trials of the auto-calibrating system were performed during the KNOX18RR cruise (Mid-Atlantic Ridge, July–August, 2008, chief scientist Anna-Louise REYSENBACH, supported by the National Science Foundation of U.S.) on the R/V Roger REVELLE. For deployment, the IrOx electrode and Ag|AgCl electrode were utilized for pH sensors and the signals were collected and recorded by an autonomous real time data-logger (Chen et al., 2005).

Keywords

Flow control
In situ calibration
Long-term
Low power
pH

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10.1631/jzus.A0900643

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title = "A long-term in situ calibration system for chemistry analysis of seawater",

abstract = "An in situ calibration system is a versatile exploration instrument for electrochemical sensors investigating the biochemical properties of the marine environment. The purpose of this paper is to describe the design of an auto-calibrating system for electrochemical (pH) sensors, which permits two-point in situ calibration, suitable for long-term measurement in deep sea aqueous environments. Holding multiple sensors, the instrument is designed to perform long-term measurements and in situ calibrations at abyssal depth (up to 4000 m). The instrument is composed of a compact fluid control system which is pressure-equilibrated and designed for deep-sea operation. In situ calibration capability plays a key role in the quality and reproducibility of the data. This paper focuses on methods for extending the lifetime of the instrument, considering the fluidics design, mechanical design, and low-power consumption of the electronics controller. The instrument can last 46 d under normal operating conditions, fulfilling the need for long-term operation. Data concerning pH measured during the KNOX18RR cruise (Mid-Atlantic Ridge, July-August, 2008) illustrate the desirable properties of the instrument. Combined with different electrodes (pH, H2, H2S, etc.), it should be of great utility for the study of deep ocean environments, including water column and diffuse-flow hydrothermal fluids.",

keywords = "Flow control, In situ calibration, Long-term, Low power, pH",

author = "Tan, {Chun Yang} and Bo Jin and Kang Ding and Seyfried, {William E.} and Ying Chen",

note = "Funding Information: ‡ Corresponding author * Project supported by National Natural Science Foundation of China (No. 40637037), the National High-Tech Research and Development Program (863) of China (No. 2007AA091901), the National Science Foundation of U.S. (No. 0525907), and the China Scholarship Council (No. 2009632124) {\textcopyright} Zhejiang University and Springer-Verlag Berlin Heidelberg 2010 Funding Information: Sea trials of the auto-calibrating system were performed during the KNOX18RR cruise (Mid-Atlantic Ridge, July–August, 2008, chief scientist Anna-Louise REYSENBACH, supported by the National Science Foundation of U.S.) on the R/V Roger REVELLE. For deployment, the IrOx electrode and Ag|AgCl electrode were utilized for pH sensors and the signals were collected and recorded by an autonomous real time data-logger (Chen et al., 2005).",

year = "2010",

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doi = "10.1631/jzus.A0900643",

language = "English (US)",

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AU - Seyfried, William E.

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PY - 2010/9

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N2 - An in situ calibration system is a versatile exploration instrument for electrochemical sensors investigating the biochemical properties of the marine environment. The purpose of this paper is to describe the design of an auto-calibrating system for electrochemical (pH) sensors, which permits two-point in situ calibration, suitable for long-term measurement in deep sea aqueous environments. Holding multiple sensors, the instrument is designed to perform long-term measurements and in situ calibrations at abyssal depth (up to 4000 m). The instrument is composed of a compact fluid control system which is pressure-equilibrated and designed for deep-sea operation. In situ calibration capability plays a key role in the quality and reproducibility of the data. This paper focuses on methods for extending the lifetime of the instrument, considering the fluidics design, mechanical design, and low-power consumption of the electronics controller. The instrument can last 46 d under normal operating conditions, fulfilling the need for long-term operation. Data concerning pH measured during the KNOX18RR cruise (Mid-Atlantic Ridge, July-August, 2008) illustrate the desirable properties of the instrument. Combined with different electrodes (pH, H2, H2S, etc.), it should be of great utility for the study of deep ocean environments, including water column and diffuse-flow hydrothermal fluids.

AB - An in situ calibration system is a versatile exploration instrument for electrochemical sensors investigating the biochemical properties of the marine environment. The purpose of this paper is to describe the design of an auto-calibrating system for electrochemical (pH) sensors, which permits two-point in situ calibration, suitable for long-term measurement in deep sea aqueous environments. Holding multiple sensors, the instrument is designed to perform long-term measurements and in situ calibrations at abyssal depth (up to 4000 m). The instrument is composed of a compact fluid control system which is pressure-equilibrated and designed for deep-sea operation. In situ calibration capability plays a key role in the quality and reproducibility of the data. This paper focuses on methods for extending the lifetime of the instrument, considering the fluidics design, mechanical design, and low-power consumption of the electronics controller. The instrument can last 46 d under normal operating conditions, fulfilling the need for long-term operation. Data concerning pH measured during the KNOX18RR cruise (Mid-Atlantic Ridge, July-August, 2008) illustrate the desirable properties of the instrument. Combined with different electrodes (pH, H2, H2S, etc.), it should be of great utility for the study of deep ocean environments, including water column and diffuse-flow hydrothermal fluids.

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A long-term in situ calibration system for chemistry analysis of seawater

Abstract

Bibliographical note

Keywords

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