In situ osmotic analyzer for the year-long continuous determination of Fe in hydrothermal systems

被引：43

作者：

Chapin, TP ^{[1
]}

Jannasch, HW ^{[1
]}

Johnson, KS ^{[1
]}

机构：

[1] Monterey Bay Aquarium Res Inst, Moss Landing, CA 95039 USA

来源：

ANALYTICA CHIMICA ACTA | 2002年 / 463卷 / 02期

基金：

美国国家科学基金会;

关键词：

iron determination; in situ; hydrothermal; seawater; long-term; osmotic pumps;

D O I：

10.1016/S0003-2670(02)00423-3

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A submersible osmotically pumped analyzer (Fe-OsmoAnalyzer) has been adapted for the long-term continuous high resolution monitoring of iron(II) and (III) in deep-sea hydrothermal vents. Ferrozine is used as the colorimetric reagent. The detection limit for our analyzer is 0.1 muM for a 0.7 cm pathlength with a linear response up to 50 muM. The Fe-OsmoAnalyzer uses periodic injections of standards and blanks to self calibrate and can operate unattended for over a year collecting data every 15 min. The Fe-OsmoAnalyzer was field tested during a 6 week test deployment at 900 m in Monterey Bay and a year-long deployment at 1100 m off the coast of Hawaii. A second year-long deployment in a low temperature hydrothermal vent on the Juan de Fuca Ridge provided high resolution continuous monitoring of Fe and was able to distinguish tidally influenced fluctuations in Fe concentrations. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：265 / 274

页数：10

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