Browsing HELCOM Manuals and Guidelines by Subject "dissolved gas sensors"

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Guidelines for sampling and determination of dissolved oxygen in seawater.

HELCOM (HELCOM, Helsinki, Finland, 2018)

The dissolved oxygen (DO) content in seawater is controlled by several unrelated processes including exchange with air, metabolism of plants and animals, microbial and chemical decomposition of organic matter, hydrodynamic ...
Guidelines for sampling and determination of hydrogen sulphide (H2S) in Seawater.

HELCOM (HELCOM, Helsinki, Finland, 2017)

Hydrogen sulphide is a poisonous gas that readily dissolves in water. The sulphide is formed in stagnant waters, where the oxygen has been consumed by bacteria oxidizing organic matter to carbon dioxide, water, and inorganic ...