ISO 10349-3:1992
(Main)Photography - Photographic-grade chemicals - Test methods - Part 3: Determination of matter insoluble in ammonium hydroxide solution
Photography - Photographic-grade chemicals - Test methods - Part 3: Determination of matter insoluble in ammonium hydroxide solution
The method is based on weighing a test portion, dissolution in water, addition of ammonium oxalate solution, diammonium hydrogen phosphate solution and ammonium hydroxide solution, allowing to stand for at least 8 h, filtering out the precipitate through filter paper, transfer of the filter paper with precipitate to a prepared crucible, burning it over a gas burner, incineration of the residue in a furnace, cooling in a desiccator, and reweighing.
Photographie — Produits chimiques de qualité photographique — Méthodes d'essai — Partie 3: Détermination des matières insolubles dans une solution d'hydroxyde d'ammonium
General Information
- Status
- Published
- Publication Date
- 29-Dec-1992
- Technical Committee
- ISO/TC 42 - Photography
- Drafting Committee
- ISO/TC 42 - Photography
- Current Stage
- 9093 - International Standard confirmed
- Start Date
- 20-Dec-2023
- Completion Date
- 13-Dec-2025
Overview
ISO 10349-3:1992 - Photography - Photographic-grade chemicals - Test methods - Part 3: Determination of matter insoluble in ammonium hydroxide solution describes a laboratory test to quantify the fraction of a photographic-grade chemical that is insoluble in ammonium hydroxide. The method isolates precipitated calcium, magnesium and ammonium hydroxides, then determines their mass after ignition. This standard supports quality control and chemical analysis in photographic materials and related industries.
Key topics and requirements
- Scope: General test method to determine matter insoluble in ammonium hydroxide solution for photographic-grade chemicals.
- Test portion and dissolution: Weigh a test portion of 10.0 g ± 0.1 g and dissolve in 75 ml of water.
- Reagents (specified concentrations):
- Ammonium oxalate solution: dissolve 40 g ammonium oxalate monohydrate in 500 ml water and dilute to 1 L.
- Diammonium hydrogen phosphate solution: dissolve 10 g in 50 ml water and dilute to 100 ml.
- Ammonium hydroxide solution (1+9): 10 ml NH4OH (ρ = 0.91 g/ml) diluted to 100 ml.
- Dilute ammonium hydroxide (1+39): 25 ml NH4OH diluted to 1 L.
- Procedure summary:
- Add 5 ml ammonium oxalate, 4 ml diammonium hydrogen phosphate, and 10 ml ammonium hydroxide to the dissolved sample.
- Allow to stand at least 8 hours to form precipitate.
- Filter on ashless filter paper, wash with dilute ammonium hydroxide.
- Transfer filter with precipitate to a prepared ignition crucible; burn off paper and incinerate residue in a muffle furnace (600 °C ± 50 °C) to constant weight.
- Cool in a desiccator and reweigh.
- Calculation: Express insoluble matter as percentage by mass using the mass of test portion, crucible, and crucible+residue.
- Apparatus & safety: Requires ignition crucible (porcelain/alumina/platinum/quartz), muffle furnace to 600 °C, ashless filter paper (10–15 µm retention), and desiccator. Follow hazard guidance referenced in ISO 10349-1.
Applications and users
- Quality control laboratories in photographic chemical manufacturing.
- Analytical chemistry labs performing chemical composition and purity testing.
- Conservation and archival labs concerned with chemical contaminants in photographic materials.
- Suppliers and purchasers of photographic-grade chemicals for specification compliance.
- Regulatory or standards bodies assessing conformity of photographic reagents.
Related standards
- ISO 10349-1:1992 - General requirements for photographic-grade chemicals test methods.
- Other parts of ISO 10349 series cover insoluble matter in water, residue after ignition, heavy metals, halide content, alkalinity/acidity, volatile matter, sulfide content, reaction to ammoniacal silver nitrate, specific gravity and density.
Keywords: ISO 10349-3:1992, photographic-grade chemicals, ammonium hydroxide, insoluble matter, test methods, photography, chemical analysis, quality control.
Frequently Asked Questions
ISO 10349-3:1992 is a standard published by the International Organization for Standardization (ISO). Its full title is "Photography - Photographic-grade chemicals - Test methods - Part 3: Determination of matter insoluble in ammonium hydroxide solution". This standard covers: The method is based on weighing a test portion, dissolution in water, addition of ammonium oxalate solution, diammonium hydrogen phosphate solution and ammonium hydroxide solution, allowing to stand for at least 8 h, filtering out the precipitate through filter paper, transfer of the filter paper with precipitate to a prepared crucible, burning it over a gas burner, incineration of the residue in a furnace, cooling in a desiccator, and reweighing.
The method is based on weighing a test portion, dissolution in water, addition of ammonium oxalate solution, diammonium hydrogen phosphate solution and ammonium hydroxide solution, allowing to stand for at least 8 h, filtering out the precipitate through filter paper, transfer of the filter paper with precipitate to a prepared crucible, burning it over a gas burner, incineration of the residue in a furnace, cooling in a desiccator, and reweighing.
ISO 10349-3:1992 is classified under the following ICS (International Classification for Standards) categories: 37.040.30 - Photographic chemicals. The ICS classification helps identify the subject area and facilitates finding related standards.
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD
10349-3
First edition
1992-12-15
- Photographit-grade
Photography
chemicals - Test methods -
Part 3:
Determination of matter insoluble in
ammonium hydroxide Solution
Photographie - Produits chimiques de qualit6 photographique -
Methodes d ’essai -
Partie 3: DGtermination des ma tieres insolubles dans une solution
d ’hydroxyde d ’ammonium
Reference number
ISO 10349=3:1992(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide
federation of national Standards bodies (ISO member bodies). The work
of preparing International Standards is normally carried out through ISO
technical committees. Esch member body interested in a subject for
which a technical committee has been established has the right to be
represented on that committee. International organizations, governmental
and non-governmental, in liaison with ISO, also take part in the work. ISO
collaborates closely with the International Electrotechnical Commission
(IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard ISO 10349-3 was prepared by Technical Committee
ISOfTC 42, Photography.
ISO 10349 consists of the following Parts, under the general title Pho-
tography - Photographit-grade chemicals - Test methods:
- Part 1: General
- Part 2: Determination of matter insoluble in wa ter
- Part 3: Determination of matter insoluble in ammonium h ydroxide
Solution
- Part 4: Determination of residue after ignition
- Part 5: Determination of heavy me tals and iron tonten t
- Part 6: Determination of halide content
- Part 7: Determination of alkalinity or acidity
- Part 8: Determination of vola tile matter
- Part 9: Reaction to ammoniacal silver nitrate
- Part IO: Determination of sulfide content
0 ISO 1992
All rights reserved. No patt of this publication may be reproduced or utilized in any ferm or
by any means, electronie or mechanical, including photocopying and microfilm, without per-
mission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-1 211 Geneve 20 l Switzerland
Printed in Switzerland
ISO 10349=3:1992(E)
- Part 11: Determination of specific gravity
- Part 12: Determination of density
This page intentionally left blank
INTERNATIONAL STANDARD ISO 10349=3:1992(E)
- Photographit-grade chemicals
Photography - Test
methods -
Part 3:
Determination of matter insoluble in ammonium hydroxide
Solution
4 Reagents
1 Scope
See ISO 10349-1 for general requirements.
This part of ISO 10349 specifies a general test
method for the determination of the content of matter
insoluble in ammonium hydroxide Solution (as a pre-
cipitate of Calcium, magnesium and ammonium hy-
4.1 Ammonium oxalate solution
droxides) in photographit-grade chemicals.
Dissolve 40 g of ammonium oxalate monohydrate,
(NH,),C,O,*H,O (DANGER > < B >) in
I
500 ml of water, then dilute to 1 litre.
2 Normative reference
The following Standard contains provisions which,
4.2 Diammonium hydrogen Phosphate solution,
...
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