ISO 10348:1993

Photography — Processing wastes — Determination of silver content

Three analytical procedures are given with two supporting sample treatment methodologies: a flame atomic absorption spectroscopy (AAS) method and two potentiometric iodide titration (PT) methods. The choice of treatment is dependent on the analysis method and form of sample. The AAS method allows cyanogen iodide-treated or preserved samples to be analyzed directly, the PT method requires one of two digestion procedures given.

Photographie — Effluents de traitement — Détermination de la teneur en argent

General Information

• Status: Published
• Publication Date: 03-Feb-1993
• ICS: 13.030.30 - Special wastes
• ICS: 37.040.30 - Photographic chemicals
• Technical Committee: ISO/TC 42 - Photography
• Drafting Committee: ISO/TC 42 - Photography
• Current Stage: 9093 - International Standard confirmed
• Completion Date: 20-Dec-2023

Standards Content (Sample)

INTERNATIONAL IS0
STANDARD 10348
First edition
1993-02-01
- Processing wastes -
Photography
Determination of silver content
- Dgtermina tion de la teneur
Photographie - Effluents de traitement
en argent
Reference number
IS0 10348:-I 993(E)
- -

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IS0 10348:1993(E)
Contents
Page
1 scope . 1
2 Normative references . 1
3 Principle . 2
. 2
3.1 Flame atomic absorption spectroscopy (AAS) methodology
3.2 Potentiometric titration (PT) methodology . 2
4 Reliability . 2
........................................... 2
5 Safety and operational precautions
5.1 Hazard warnings . 3
5.2 Hazard information code system . 3
.................................................................. 3
5.3 Safety precautions
..........................................................
5.4 Operational precautions 3
6 Reagents . 4
5
7 Glassware .
8 Sampling and sample pretreatment . 5
8.1 Sampling and preservation . 5
6
8.2 Sample size and pretreatment .
9 Preparation of test sample . 7
9.1 Cyanogen iodide (CNI) treatment . 7
9.2 Concentration and digestion (Digestion A) . 8
9.3 Vigorous digestion (Digestion B) . 8
10 Analysis by atomic absorption spectroscopy (AAS) . 9
................................... 9
10.1 Special apparatus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
................................... 9
10.2 Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
...................... 9
11 Analysis by potentiometric iodide titration PT)
10
11 .I Special apparatus . . . . . . . . . .~.~.~.
0 IS0 1993
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
II

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IS0 10348:1993(E)
11.2 Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
11.3 Calculations for titration methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Annex
A Preparation of reagent solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
A.1 Preparation of cyanogen iodide solution (CNI) (DANGER: << S >>
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
) 12
A.2 Preparation of silver standard solutions (0,5 mg/l, I,0 mg/l, 3,0
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
mg/l and 5,0 mg/l) for AAS method
A.3 Preparation of silver nitrate standard solutions (0,100 mol/l, 0,010
mol/l and 0,001 mol/l) for PT methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
A.4 Preparation of potassium iodide standard solutions (0,l mol/l, 0,Ol
mol/l and 0,001 mol/l) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

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IS0 10348:1993(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
(I EC) on all matters of
...