ISO 10349-6:1992
(Main)Photography - Photographic-grade chemicals - Test methods - Part 6: Determination of halide content
Photography - Photographic-grade chemicals - Test methods - Part 6: Determination of halide content
The method is based on weighing the test portion, dissolution in water, transfer of a 20 ml aliquot in a beaker, pipetting halide standard A or B into a second beaker, adding nitric acid solution plus silver nitrate solution to each beaker, dilution with water, transfer of the treated solutions into separate Nessler colour-comparison cylinders, and observing the turbidity of the two solutions.
Photographie — Produits chimiques de qualité photographique — Méthodes d'essai — Partie 6: Détermination de la teneur en halogénures
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
- 05-Jun-2023
- Completion Date
- 13-Dec-2025
Overview
ISO 10349-6:1992 - Photography - Photographic-grade chemicals - Test methods - Part 6: Determination of halide content - specifies a comparative turbidity test for measuring halide content (reported as chloride ions, Cl–) in photographic-grade chemicals. Published by ISO/TC 42 (Photography) in 1992, the method uses a weighed test portion, dissolution in water, controlled acidification and precipitation with silver nitrate, and visual comparison of turbidity in matched Nessler colour‑comparison cylinders against prepared halide standards.
Key topics and requirements
- Scope: General test method for halide content of photographic-grade chemicals; results reported as chloride ions (Cl–). Individual standards may report halide as a salt by modifying the calculation.
- Sample preparation: Weigh a test portion (0.9–1.1 g), dissolve in 200 ml water and take a 20 ml aliquot.
- Standards: Two halide standard solutions are defined:
- Halide standard A: 0.01 mg Cl/ml (prepared from sodium chloride stock)
- Halide standard B: 0.001 mg Cl/ml (diluted from stock)
- Reagents:
- Nitric acid solution (1 + 9)
- Silver nitrate solution, 100 g/l
- Procedure: Add the appropriate volume of halide standard A or B (per Table 1 test limits) to a second beaker; to both sample and standard add nitric acid and silver nitrate, dilute to 50 ml, transfer to 50 ml matched Nessler cylinders and compare turbidity visually. The turbidity in the test solution shall not exceed that of the applicable standard.
- Apparatus: Two matched Nessler colour‑comparison cylinders (50 ml).
- Hazards and reporting: Follow ISO 10349-1 for general hazard warnings and reporting requirements. Test report must identify the method, operating details, any deviations and the result.
Applications and users
- Quality control laboratories in photographic chemical manufacturing
- Analytical/contract testing labs performing routine acceptance tests
- Suppliers and purchasers of photographic reagents who require specification compliance
- Standards and regulatory bodies assessing material conformity
Benefits include a simple, low‑instrumentation visual method for ensuring halide impurities are within acceptable limits for photographic processes where halides can affect image formation or processing chemistry.
Related standards
ISO 10349 is a multipart series for photographic‑grade chemical testing. Relevant parts include:
- ISO 10349-1: General requirements
- ISO 10349-2 to -12: Tests for insoluble matter, residue after ignition, heavy metals, alkalinity/acidity, volatile matter, sulfide content, specific gravity and density, etc.
Keywords: ISO 10349-6, halide content, photographic-grade chemicals, test methods, silver nitrate, Nessler cylinders, chloride determination.
Frequently Asked Questions
ISO 10349-6:1992 is a standard published by the International Organization for Standardization (ISO). Its full title is "Photography - Photographic-grade chemicals - Test methods - Part 6: Determination of halide content". This standard covers: The method is based on weighing the test portion, dissolution in water, transfer of a 20 ml aliquot in a beaker, pipetting halide standard A or B into a second beaker, adding nitric acid solution plus silver nitrate solution to each beaker, dilution with water, transfer of the treated solutions into separate Nessler colour-comparison cylinders, and observing the turbidity of the two solutions.
The method is based on weighing the test portion, dissolution in water, transfer of a 20 ml aliquot in a beaker, pipetting halide standard A or B into a second beaker, adding nitric acid solution plus silver nitrate solution to each beaker, dilution with water, transfer of the treated solutions into separate Nessler colour-comparison cylinders, and observing the turbidity of the two solutions.
ISO 10349-6:1992 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.
You can purchase ISO 10349-6:1992 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of ISO standards.
Standards Content (Sample)
INTERNATIONAL
IS0
STANDARD
10349-6
First edition
1992-l 2-15
- Photographic-grade
Photography
chemicals - Test methods -
Part 6:
Determination of halide content
- Produits chimiques de qua/it& photographique -
Photographie
Mbthodes d’essai -
Partie 6: Dbermination de la teneur en halog&ures
Reference number
IS0 10349-6:1992(E)
IS0 10349=6:1992(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide
federation of national standards bodies (IS0 member bodies). The work
of preparing International Standards is normally carried out through IS0
technical committees. Each 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. IS0
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 IS0 10349-6 was prepared by Technical Committee
lSO/TC 42, Photography.
IS0 10349 consists of the following parts, under the general title Pho-
tography - Photographic-grade chemicals - Test methods:
- Part 1: General
- Part 2: Determination of matter insoluble in water
- Part 3: Determination of matter insoluble in ammonium hydroxide
solution
- Part 4: Determination of residue after ignition
- Part 5: Determination of heavy metals and iron content
- Part 6: Determination of halide content
- Part 7: Determination of alkalinity or acidity
- Part 8: Determination of volatile matter
- Part 9: Reaction to ammoniacal silver nitrate
- Part ? 0: Determination of sulfide con tent
0 IS0 1992
All rights reserved. No part of this publication may be reproduced or utilized in any form or
by any means, electronic or mechanical, including photocopying and microfilm, without per-
mission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-1211 Geneve 20 l Switzerland
Printed in Switzerland
IS0 10349=6:1992(E)
- Part I I: Determination of specific gravity
- Part 12: Determination of density
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INTERNATIONAL STANDARD
IS0 10349=6:1992(E)
Photography - Photographic-grade chemicals
- Test
methods -
Part 6:
Determination of halide content
4 Reagents
1 Scope
This part of IS0 10349 specifies a general test
See IS0 10349- 1 for general requirements.
method for the determination of the halide content
(reported as chloride ions, Cl-) of photographic-grade
chemicals.
4.1 Halide standard solutions
NOTE 1 Individual International Standards may report the
halide as a salt by modifying the calculation.
Prepare halide standard solution A and/or halide stan-
dard solution B as required for the test limits (see ta-
ble I).
2 Normative reference
4.1.1 Halide standard solution A, 0,Ol mg Cl/ml.
The following standard contains provisions which,
through reference in this text, constitute provisions
Dissolve I,65 g of sodium chloride, which ha
...
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