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1、 ANSI/I3A IT4.304-2002 for Photography Processing Chemicals Specifications for Sodium Ferrocyanide Decahydrate ANSI/I3A IT4.304-2002 Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=USN Ship Repair Facility Yokosuka/9961031100 Not for Resale, 05/09/200
2、7 01:17:12 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=USN Ship Repair Facility Yokosuka/9961031100 Not for Resale, 05/09/2007 01:17:12 MDTNo reproduction or networking perm
3、itted without license from IHS -,-,- ANSI/I3A IT4.304-2002 Revision and redesignation of ANSI/NAPM IT4.304-1987 (R1996) American National Standard for Photography Processing Chemicals Specifications for Sodium Ferrocyanide Decahydrate Secretariat International Imaging Industry Association, Inc. (I3A
4、) Approved June 10, 2002 American National Standards Institute, Inc. Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=USN Ship Repair Facility Yokosuka/9961031100 Not for Resale, 05/09/2007 01:17:12 MDTNo reproduction or networking permitted without li
5、cense from IHS -,-,- Approval of an American National Standard requires review by ANSI that the requirements for due process, consensus, and other criteria for approval have been met by the standards developer. Consensus is established when, in the judgement of the ANSI Board of Standards Review, su
6、bstantial agreement has been reached by directly and materially affected interests. Substantial agreement means much more than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be considered, and that a concerted effort be made towards their resolutio
7、n. The use of American National Standards is completely voluntary; their existence does not in any respect preclude anyone, whether he has approved the standards or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not conforming to the standards. The Americ
8、an National Standards Institute does not develop standards and will in no circumstances give an interpretation of any American National Standard. Moreover, no person shall have the right or authority to issue an interpretation of an American National Standard in the name of the American National Sta
9、ndards Institute. Requests for interpretations should be addressed to the secretariat or sponsor whose name appears on the title page of this standard. CAUTION NOTICE: This American National Standard may be revised or withdrawn at any time. The procedures of the American National Standards Institute
10、 require that action be taken periodically to reaffirm, revise, or withdraw this standard. Purchasers of American National Standards may receive current information on all standards by calling or writing the American National Standards Institute. American National Standard Published by American Nati
11、onal Standards Institute, Inc. 25 West 43rd Street, New York, NY 10036 Copyright 2002 by American National Standards Institute, Inc. All rights reserved. No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without prior written permission of the
12、 publisher. Printed in the United States of America Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=USN Ship Repair Facility Yokosuka/9961031100 Not for Resale, 05/09/2007 01:17:12 MDTNo reproduction or networking permitted without license from IHS -,
13、-,- i Contents Page Forewordii 0Introduction.iii 1Scope . 1 2Normative references. 1 3General. 1 4Requirements. 2 5Reagents and glassware 2 6Sampling. 2 7Test methods 2 Table 1Summary of requirements 2 Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=U
14、SN Ship Repair Facility Yokosuka/9961031100 Not for Resale, 05/09/2007 01:17:12 MDTNo reproduction or networking permitted without license from IHS -,-,- ii Foreword(This foreword is not part of American National Standard ANSI/I3A IT4.304-2002.) This standard is one of a series of standards establis
15、hing criteria of purity for chemi- cals used in processing photographic materials. In the current review process, this series of standards is being updated and revised in format. Many of the standards in this series, but not all, also exist as standards of the International Organization for Standard
16、ization (ISO). The current updates and revisions are in accord with that done for the ISO standards. In an effort to promote the concept of international stan- dardization, references to ISO standards have been left in place. Suggestions for the improvement of this standard will be welcome. They sho
17、uld be sent to the International Imaging Industry Association, Inc. (I3A), 550 Mamaroneck Avenue, Suite 307, Harrison, NY 10528-1615, e-mail: i3astdsi3a.org. This standard was processed and approved for submittal to ANSI by I3A Technical Committee IT4 on Photographic Processing. Committee approval o
18、f the standard does not necessarily imply that all committee members voted for its approval. At the time it approved this edition of the standard, the IT4 Committee had the following members: Joseph M. Rao, Chairman John Gignac, Secretary Organization RepresentedName of Representative International
19、Imaging Industry Association, Inc. (I3A) Jan Carlock Linda Crosby Kunihiro Fujiwara Ronald A. Klein Laszlo Papai Anthony Jarkowsky General Chemical Corporation. Mark Dulik Photographic Society of America, Inc. . Grant Haist Photo Marketing Association International Herb Stein Individual Experts Pete
20、r Krause Norman Newman Joseph M. Rao Subcommittee IT4-1 on Specifications for Photographic Chemicals, which was re- sponsible for this edition, had the following members: Joseph M. Rao, Chairman-protemJan Carlock Linda Crosby Mark Dulik Kunihiro Fujiwara Norman Newman Laszlo Papai Herb Stein Copyrig
21、ht American National Standards Institute Provided by IHS under license with ANSI Licensee=USN Ship Repair Facility Yokosuka/9961031100 Not for Resale, 05/09/2007 01:17:12 MDTNo reproduction or networking permitted without license from IHS -,-,- iii 0 Introduction 0.1 This standard is one of a series
22、 that establishes criteria of purity for chemicals used in processing photographic materials. General test methods and procedures cited in this standard are compiled in Parts 1 and 8 of ISO 10349. This standard is intended for use by individuals with a working knowledge of analyti- cal techniques, w
23、hich may not always be the case. Some of the procedures utilize caustic, toxic, or otherwise hazardous chemicals. Safe laboratory practice for the handling of chemicals requires the use of safety glasses or goggles and other protec- tive apparel such as rubber gloves, face masks or aprons where appr
24、opriate. Normal precautions required in the performance of any chemical procedure shall be exercised at all times, but care has been taken in this standard to provide warnings for hazardous materials. Hazard warnings designated by a letter enclosed in angle brackets, , are used as a reminder in thos
25、e steps detailing handling operations and are defined in ISO 10349-1. More detailed information regarding hazards, han- dling, and use of these chemicals may be available from the manufacturer. 0.2 This standard provides chemical and physical requirements for the suitability of a photographic-grade
26、chemical. The tests correlate with undesirable photographic ef- fects. Purity requirements are set as low as possible consistent with these photo- graphic effects. These criteria are considered the minimum requirements necessary to assure sufficient purity for use in photographic processing solution
27、s, except that if the purity of a commonly available grade of chemical exceeds photographic process- ing requirements and if there is no economic penalty in its use, the purity require- ments have been set to take advantage of the availability of the higher quality material. Every effort has been ma
28、de to keep the number of requirements to a minimum. Inert impurities are limited to amounts which will not unduly reduce the assay. All tests are performed on samples “as received“ to reflect the condition of materials furnished for use. Although the ultimate criterion for suitability of such a chem
29、ical is its successful performance in an appropriate use test, the shorter, more economical test methods described in this standard are generally adequate. Assay procedures have been included in all cases where a satisfactory method is available. An effective assay requirement serves not only as a s
30、afeguard of chemical purity, but also as a valuable complement to the identity test. Identity tests have been included whenever a possibility exists that another chemical or mixture of chemicals could pass the other tests. All requirements listed in clause 4 are mandatory. The physical appearance of
31、 the material and any footnotes are for general information only and are not part of the re- quirements. 0.3 Efforts have been made to employ tests that are capable of being run in any nor- mally equipped laboratory and, wherever possible, to avoid tests that require highly specialized equipment or
32、techniques. Instrumental methods have been specified only as alternative methods or alone in those cases where no other satisfactory method is available. Over the past few years, great improvements have been made in instrumentation for various analyses. Where such techniques have equivalent or great
33、er precision, they may be used in place of the tests described in this standard. Correlation of such alter- native procedures with the given method is the responsibility of the user. In case of disagreement in results, the method called for in the specification shall prevail. Where a requirement sta
34、tes “to pass test“, however, alternative methods shall not be used. Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=USN Ship Repair Facility Yokosuka/9961031100 Not for Resale, 05/09/2007 01:17:12 MDTNo reproduction or networking permitted without lic
35、ense from IHS -,-,- AMERICAN NATIONAL STANDARD ANSI/I3A IT4.304-2002 1 American National Standard for Photography Processing Chemicals Specifications for Sodium Ferrocyanide Decahydrate 1 Scope This standard establishes criteria for the purity of photographic-grade sodium ferrocyanide decahydrate an
36、d specifies the tests to be used to determine the purity. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this standard. At the time of publication, the editions indicated were valid. All standards are subject to revis
37、ion, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid standards. ISO 10349-1:1992, Photography Photographic-grade chemical
38、s Test methods Part 1: General. ISO 10349-8:1992, Photography Photographic-grade chemicals Test methods Part 8: Determination of volatile matter. 3 General 3.1 Physical properties Sodium ferrocyanide decahydrate, Na4Fe(CN)6 ?2O, exists in the form of pale-yellow to yellow crystals. It has a relative
39、 molecular mass of 484.07. 3.2 Hazardous properties Caution must be exercised in handling sodium ferrocyanide. To avoid the generation of very toxic hydrogen cyanide: DO NOT MIX this chemical with hot or concentrated acids; DO NOT EXPOSE solutions containing this chemical to sunlight. 3.3 Storage So
40、dium ferrocyanide decahydrate loses part of its water of crystallization when it is stored in paper bags or exposed to ordinary laboratory conditions. There is no substantial loss in weight when this chemical is stored in moisture-proof bags or in plastic liners. Copyright American National Standard
41、s Institute Provided by IHS under license with ANSI Licensee=USN Ship Repair Facility Yokosuka/9961031100 Not for Resale, 05/09/2007 01:17:12 MDTNo reproduction or networking permitted without license from IHS -,-,- ANSI/I3A IT4.304-2002 2 4 Requirements A summary of the requirements is shown in Tab
42、le 1. Table 1 Summary of requirements Test Limit Subclause Standard in which test method is given Assay Minimum: 98.0% Maximum: 102.0% 7.1 ANSI/I3A IT4.304 Mass fraction of volatile matter Minimum: 35.2% Maximum: 39.2% 7.2 ISO 10349-8 Mass fraction of insoluble matter Maximum: 0.03% 7.3 ANSI/I3A IT4
43、.304 5 Reagents and glassware All reagents, materials, and glassware shall conform with the requirements specified in ISO 10349-1 unless otherwise noted. The hazard warning symbols, used as a reminder in those steps detailing handling operations, are defined in ISO 10349-1. These symbols are used to
44、 provide information to the user and are not meant to provide conformance with hazardous labeling requirements, as these vary from country to country. 6 Sampling See ISO 10349-1. 7 Test methods 7.1 Assay 7.1.1 Specification The minimum mass fraction content of sodium ferrocyanide decahydrate shall b
45、e 98.0%; the maximum mass fraction shall be 102.0%. 7.1.2 Reagents 7.1.2.1 Sulfuric acid, H2SO4, 1.84 g/ml (DANGER: ).1) 7.1.2.2 Potassium permanganate, KMnO4, standard volumetric solution of 0.02 mol/l (3.16 g/l). 7.1.3 Apparatus 7.1.3.1 Burette, of 50 ml capacity. 7.1.4 Procedure Use a test portio
46、n of the sample of about 2 g weighed to the nearest 0.0001 g. Transfer the test portion to a 600 ml beaker, add 400 ml of water, and dissolve. Add 10 ml of sulfuric acid (7.1.2.1) () and titrate with standard potassium permanganate solution (7.1.2.2) until the first trace of brown color is visible.
47、_ _ _ _ _ _ 1) Hazard warning codes are defined in ISO 10349-1, clause 4. Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=USN Ship Repair Facility Yokosuka/9961031100 Not for Resale, 05/09/2007 01:17:12 MDTNo reproduction or networking permitted witho
48、ut license from IHS -,-,- ANSI/I3A IT4.304-2002 3 7.1.5 Expression of results The assay, expressed as a percentage by the mass of Na4Fe(CN)6 10H2O, is given by where V is the volume, in milliliters, of the potassium permanganate (7.1.2.2) used to reach the titration endpoint; m is the mass, in grams, of the test portion; 4.841 is a conversion factor for the mass of Na4Fe(CN)6 10H2O equivalent to 1 mole of potassium permanganate (i.e., 48.41) x the conve