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Determination of hydrogen sulfide in seawater using flow injection analysis and flow analysis 1
Author(s) -
SakamotoArnold Carole M.,
Johnson Kenneth S.,
Beehler Carl L.
Publication year - 1986
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1986.31.4.0894
Subject(s) - detection limit , triiodide , flow injection analysis , seawater , hydrogen sulfide , sulfide , methylene blue , chemistry , hydrothermal circulation , chromatography , analytical chemistry (journal) , geology , sulfur , organic chemistry , oceanography , electrode , photocatalysis , seismology , dye sensitized solar cell , electrolyte , catalysis
Flow injection analysis (FIA) and flow analysis (FA) were used to automate the colorimetric determination of hydrogen sulfide by the methylene blue method. A low‐sensitivity FIA manifold for concentrations up to 200 µ M H 2 S had a detection limit of 1.2 µ M. A high‐sensitivity FIA manifold for concentrations up to 75 µ M H 2 S had a detection limit of 0.12 µ M. The C.V. was <1% at concentrations >10 M . Sulfide standards were calibrated by colorimetric measurement of the excess triiodide ion remaining after reacting sulfide with iodine. The FIA method was tested onboard ship with samples from the Galapagos hydrothermal vents and compared with results obtained in situ using FA.