Standard Test Method for Available Sulfide in Water by Gas Extraction

Importancia y uso:

5.1 Sulfide ion is found in groundwaters and wastewater causing odor and corrosion problems. The different forms of sulfides (soluble, insoluble, and gaseous sulfides in water) depend on the pH of the water constitution. The variation in the composition can increase or decrease the corrosion-, toxicity- and odor-potential of the water. If acidified, these waters can release hydrogen sulfide, which is extremely toxic even at low levels.

5.2 This test method provides a means for interference-free measurement of free sulfide ion. The result is a bulk parameter of all soluble and gaseous sulfides in the water sample. The method can determine the gaseous and soluble sulfides completely and undissolved sulfides depending on their solubility at pH 1.0.

Note 1: Sulfide forms complexes with hydrogen ions (HS⁻ and H₂S). In addition, sulfide ion forms soluble complexes with elemental sulfur (S₂²⁻, S₃²⁻, S₄²⁻, and so forth), tin, antimony, and arsenic ions.

Subcomité:

D19.05

Volúmen:

11.01

Palabras clave:

acidification; electrochemical; gas extraction; hydrogen sulfide; sensor; sulfide; wastewater; water;