ISO 10349-10-1992 PDF

Full title and description

Photography — Photographic-grade chemicals — Test methods — Part 10: Determination of sulfide content (ISO 10349-10:1992). Specifies a laboratory colour-comparison method for determining sulfide content in photographic-grade chemical products, using a Nessler colour-comparison procedure and an alkaline lead reagent for development of the test colour.

Abstract

The standard describes a quantitative colour-comparison test: a weighed test portion is dissolved in water, the solution is placed in a Nessler colour‑comparison cylinder, a sulfide standard is prepared in a second cylinder, an alkaline lead solution is added, volumes are made up, mixed and the two solutions are compared for colour and clarity to determine sulfide content. The procedure is intended for routine quality‑control testing of photographic‑grade chemicals.

General information

• Status: Published (International Standard; confirmed following systematic review).
• Publication date: December 1992 (Edition 1, 1992 — often listed as 30 December 1992 in bibliographic records).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 37.040.30 (Photographic chemicals).
• Edition / version: Edition 1 (1992).
• Number of pages: 2 (concise test method published as a short part of the ISO 10349 series).

Scope

This part of ISO 10349 specifies a colour‑comparison test method for determining the sulfide content of photographic‑grade chemicals and reagents. It is intended for use where a laboratory procedure for routine quality control and acceptance testing of photographic chemicals is required, and complements other ISO 10349 parts that cover different analytes and test procedures.

Key topics and requirements

• Preparation and accurate weighing of the test portion.
• Dissolution of the test portion in water and transfer to a Nessler colour‑comparison cylinder.
• Preparation of a sulfide standard in a second Nessler cylinder for direct comparison.
• Addition of an alkaline lead solution to develop the test colour and evaluation of colour and clarity.
• Procedure designed for routine laboratory quality control of photographic‑grade chemicals; specifies minimal apparatus, reagents and comparison technique.

Typical use and users

Analytical and quality‑control laboratories in photographic chemical manufacture and processing, chemical suppliers certifying reagent quality, standards organizations, and researchers who require a concise, reproducible sulfide test for photographic‑grade materials. The method is typically used where quick comparative quantification (colour comparison) rather than instrumental determination is acceptable.

Related standards

ISO 10349 is a multi‑part series covering test methods for photographic‑grade chemicals. Relevant related parts include ISO 10349‑1 (General), ISO 10349‑5 (Determination of heavy metals and iron), ISO 10349‑9 (Reaction to ammoniacal silver nitrate), ISO 10349‑11 (Determination of specific gravity), and other parts that specify complementary test procedures and general requirements.

Keywords

ISO 10349-10:1992; photographic chemicals; sulfide; Nessler colour-comparison; alkaline lead; test method; quality control; ISO/TC 42.

FAQ

Q: What is this standard?

A: ISO 10349‑10:1992 is Part 10 of the ISO 10349 series and specifies a laboratory colour‑comparison method for determining sulfide content in photographic‑grade chemicals.

Q: What does it cover?

A: It covers a step‑by‑step procedure involving weighing a test portion, dissolving it, preparing a sulfide standard, adding an alkaline lead reagent, and comparing colours in Nessler cylinders to quantify sulfide content. The method is concise and intended for routine QC.

Q: Who typically uses it?

A: Quality‑control and analytical laboratories in the photographic industry, chemical suppliers, and standards bodies or researchers who need a standardised, rapid comparative test for sulfide in photographic reagents.

Q: Is it current or superseded?

A: The 1992 edition (Edition 1) remains published and was last reviewed and confirmed during the ISO systematic review process (confirmation recorded in 2023); it is therefore still listed as a current published ISO part. Users who need the absolute latest status should confirm with ISO or a national standards body for any amendments.

Q: Is it part of a series?

A: Yes — ISO 10349 is a multipart series of test methods for photographic‑grade chemicals (Part 1: General and multiple subsequent parts for specific determinations, including heavy metals, pH, specific gravity, reaction tests, etc.). ISO/TC 42 is the technical committee responsible for the series.

Q: What are the key keywords?

A: Photographic chemicals; sulfide determination; Nessler colour‑comparison; alkaline lead reagent; ISO 10349; quality control; ISO/TC 42.