ISO 10530:1992 PDF

Water quality — Determination of dissolved sulfide — Photometric method using methylene blue

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Title (English):

ISO 10530:1992

Water quality — Determination of dissolved sulfide — Photometric method using methylene blue

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 9
Publication date:: September 9, 1992
Edition:: ISO IS 10530 edition 1 version 1
ICS:: 13.060.50

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Description (English):

The specified method is applicable to sulfide determination in a mass concentration range from 0,04 mg/l to 1,5 mg/l. The following ions do not interfere in specified mass concentrations: cyanide, iodide, thiosulfate, thiocyanate, sulfite. The principle is filtration, conservation of the sulfide in the filtrate, stripping of the sulfides, formation of leukomethylene blue, measurement of the absorbance of this complex at a wavelength of 665 nm. Annex A describes standardization of sulfide stock solution.

Technical details

Technical committee: ISO/TC 147/SC 2 - Physical, chemical and biochemical methods
SKU: ISO 10530:1992

Abstract

Overview

ISO 10530:1992 specifies a photometric method using methylene blue for the determination of dissolved sulfide in water. The standard covers filtration and preservation, stripping of sulfide into a zinc acetate absorber, formation of leukomethylene blue and oxidation to methylene blue, and photometric measurement at 665 nm. The method is applicable to natural and waste waters requiring filtration and is designed for a mass concentration range of 0.04 mg/L to 1.5 mg/L (higher concentrations by dilution).

Keywords: ISO 10530, dissolved sulfide, methylene blue method, water quality, photometric method, 665 nm.

Key topics and requirements

Scope and range
- Target range: 0.04–1.5 mg/L sulfide as S (extendable by dilution).
- Not suitable for waters that cannot be filtered as specified.
Analytical principle
- Filtration → conserve sulfide with ascorbate (pH 10) → strip with nitrogen → absorb into zinc acetate → react with N,N-dimethyl-p-phenylendiamine (colour-forming reagent) + ammonium iron(III) sulfate → measure absorbance at 665 nm.
Interferences (non-significant up to stated concentrations)
- Cyanide ≤ 2 mg/L, Iodide ≤ 20 mg/L, Thiosulfate ≤ 900 mg/L, Thiocyanate ≤ 900 mg/L, Sulfite ≤ 700 mg/L.
- Carbon disulfide

Related standards

Mentioned in the description and other ISO standards

Overview

Keywords: ISO 10530, dissolved sulfide, methylene blue method, water quality, photometric method, 665 nm.

Key topics and requirements

Scope and range
- Target range: 0.04–1.5 mg/L sulfide as S (extendable by dilution).
- Not suitable for waters that cannot be filtered as specified.
Analytical principle
- Filtration → conserve sulfide with ascorbate (pH 10) → strip with nitrogen → absorb into zinc acetate → react with N,N-dimethyl-p-phenylendiamine (colour-forming reagent) + ammonium iron(III) sulfate → measure absorbance at 665 nm.
Interferences (non-significant up to stated concentrations)
- Cyanide ≤ 2 mg/L, Iodide ≤ 20 mg/L, Thiosulfate ≤ 900 mg/L, Thiocyanate ≤ 900 mg/L, Sulfite ≤ 700 mg/L.
- Carbon disulfide

ISO 10530:1992 PDF

Technical details

Abstract

Overview

Key topics and requirements

Related standards

Abstract

Overview

Key topics and requirements

Related standards

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