Study on development of an ocean nutrient monitoring instrument

海洋营养物监测仪器的研制研究

• 批准号: 07558192
• 负责人: KOIKE Isao
• 金额: $ 2.18万
• 依托单位: Ocean Research Institute, University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07558192/
• 关键词: Nutrients; Nitrate; Reactive phosphate; Monitoring; Ocean instrument; Upper coastal layrs; Ocean; Automatic nutrient analysis; 海洋表層; 分析自動化; 環境モニター; 亜硝酸イオン

Monitoring of nutrients concentrations such as nitrate and reactive phosphate is crucial to understand biogeochemical processes and their coupling with biological activities in marine environments. This project is to develop and improve a reliable nutrient monitoring instrument deployed in the ocean surface layrs. We applied photo-metric determination of nitrate after Cd-Cu column treatment and assembled in one unit frame with 100 m depth pressure tolerant, whith composed of reagents, syringe pump, Cd-Cu column, detector, battery and automatic controller. One syringe pump has multiple function, i.e., both transfer of sample water and reagents, and mixing procedure. We used 1 cm light pass for the detector, which can detect ca.0.1uM of nitrate concentration. The reagents for nitrate were chosen to be stable for 2-3 weeks continuous measurements. The sample measurement was scheduled at every 5 minutes, and obtained data is stored in a data logger. After recovery of the instrument, the data is transferred to PC.The instrument worked well in simulated field conditions and also coastal water for a week.

监测硝酸盐和活性磷酸盐等营养物浓度对于了解生物地球化学过程及其与海洋环境中生物活动的耦合至关重要。该项目旨在开发和改进部署在海洋表层的可靠营养物监测仪器。采用Cd-Cu柱处理后的光度测定硝酸盐，并组装在一个耐压100 m深度的单元框架内，由试剂、注射泵、Cd-Cu柱、检测器、电池和自动控制器组成。一台注射泵具有多种功能，即既可以转移样品水和试剂，又可以进行混合程序。我们使用1 cm光通作为检测器，可以检测ca.0.1uM的硝酸盐浓度。选择的硝酸盐试剂在连续测量 2-3 周内保持稳定。每 5 分钟安排一次样品测量，并将获得的数据存储在数据记录器中。仪器恢复后，数据传输至PC。该仪器在模拟现场条件和沿海水域中运行一周，运行良好。

项目成果

小川浩史: "高温触媒酸化法による海水中の溶存有機炭素の測定" 月刊「海洋」. (印刷中).

小川浩：“利用高温催化氧化法测量海水中溶解的有机碳”《海洋月刊》（出版中）。

Isao Koike: "High potential activity of extracellular alkaline phosphatase in the deep-waters of the central Pacific" Deep-Sea Res.(in press).

Isao Koike：“太平洋中部深水中细胞外碱性磷酸酶的高潜在活性”深海研究（正在出版）。

Isao KOIKE: "Fine scale distribution nitrous oxide in marine sediments" Marine Chemistry. 52. 185-193 (1996)

Isao KOIKE：“海洋沉积物中一氧化二氮的精细分布”海洋化学。

Koike Isao and Kazuki Terauchi: "Fine scale distribution of itrous oxide in marine sediments" Marine Chemistry. 52. 185-193 (1996)

Koike Isao 和 Kazuki Terauchi：“海洋沉积物中氧化亚铁的精细分布”海洋化学。

Isao Koike: "Fine scale distribution of nitrous oxide in marine sediments" Marine Chemistry. 52. 185-193 (1996)

Isao Koike：“海洋沉积物中一氧化二氮的精细分布”海洋化学。