ISO 10349-10:1992 PDF

Name: ISO 10349-10:1992 — Photography — Photographic-grade chemicals — Test methods — Part 10: Determination of sulfide content
SKU: ISO 10349-10:1992
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Photography — Photographic-grade chemicals — Test methods — Part 10: Determination of sulfide content

Название (английский):

ISO 10349-10:1992

Photography — Photographic-grade chemicals — Test methods — Part 10: Determination of sulfide content

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 2
Дата публикации:: 30 декабря 1992 г.
Издание:: ISO IS 10349 edition 1 version 1
ICS:: 37.040.30

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Описание (английский):

The method is based on weighing a test portion, dissolution in water, transfer to one of the Nessler colour-comparison cylinders, pipetting the volume of sulfide standard into the second Nessler colour-comparison cylinder, addition of alkaline lead solution, making up with water, mixing thoroughly, and comparing the colour and clarity of the two solutions.

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты ISO

Overview

ISO 10349-10:1992 specifies a comparative chemical test method for the determination of sulfide content in photographic‑grade chemicals. The standard is part of the ISO 10349 series on photographic‑grade chemical test methods and defines a simple, visual, color‑comparison procedure using Nessler colour‑comparison cylinders, a prepared sulfide standard, and an alkaline lead reagent. The method is intended for routine quality control of chemicals used in photographic processing and related materials.

Key topics and requirements

Scope: A general test method to determine sulfide content in photographic‑grade chemicals (ISO 10349 series context).

Sample and reagents:

Test portion: 2.0 g ± 0.1 g dissolved in 25 ml water.
Sulfide standard: prepared from sodium sulfide nonahydrate (procedure yields a labeled standard; the document specifies a standard concentration of 0.001 mg S/ml).
Alkaline lead solution: prepared by combining sodium hydroxide solution with lead acetate solution until a precipitate redissolves, then adding a small excess (lead reagent is used with care because of health hazards).

Apparatus: Two matched Nessler colour‑comparison cylinders (50 ml capacity each).

Procedure:

Transfer the dissolved sample into one Nessler cylinder.
Pipette the specified volume of sulfide standard into the matched cylinder (volumes depend on the test limit; consult the standard’s table for exact volumes).
Add 2 ml alkaline lead solution to each cylinder, make up to the 50 ml mark, mix thoroughly.
Compare colour and clarity of the two solutions visually. Any darkening in the test solution must not exceed that of the treated sulfide standard.

Safety: Lead acetate is identified as a potential carcinogen and reproductive hazard. Follow ISO 10349‑1 for general hazard guidance and laboratory safety.

Applications and users

Used for quality control of photographic‑grade chemicals (suppliers and manufacturers).

Suitable for chemical analysis laboratories performing incoming inspection or routine batch testing of photographic reagents.

Useful to conservators and analytical chemists verifying impurity levels that can affect photographic processing quality.

Typical users: laboratory technicians, QC managers, standards compliance personnel, and technical auditors in photographic chemical production.

Related standards

ISO 10349‑1:1992 - Photography - Photographic‑grade chemicals - Test methods - Part 1: General (hazard codes, glassware and general requirements).

Other parts of ISO 10349 address insolubles, heavy metals, halides, alkalinity, and related chemical tests.

Keywords: ISO 10349-10, sulfide content determination, photographic‑grade chemicals, Nessler colour‑comparison, alkaline lead reagent, sulfide standard, photography chemical QC.

ISO 10349-10:1992 PDF

Abstract

Похожие стандарты

Overview

Key topics and requirements

Applications and users

Related standards

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