BS ISO 7766-2003 en_1514 Processing photographic wastes - Analysis of cyanides - Determination of hexacyanoferrate(II) and hexacyanoferrate(III) by spectrometry《摄影冲洗废液.氰化物分析.用光谱.pdf
《BS ISO 7766-2003 en_1514 Processing photographic wastes - Analysis of cyanides - Determination of hexacyanoferrate(II) and hexacyanoferrate(III) by spectrometry《摄影冲洗废液.氰化物分析.用光谱.pdf》由会员分享,可在线阅读,更多相关《BS ISO 7766-2003 en_1514 Processing photographic wastes - Analysis of cyanides - Determination of hexacyanoferrate(II) and hexacyanoferrate(III) by spectrometry《摄影冲洗废液.氰化物分析.用光谱.pdf(16页珍藏版)》请在麦多课文档分享上搜索。
1、BRITISH STANDARD BS ISO 7766:2003 Processing photographic wastes Analysis of cyanides Determination of hexacyanoferrate(II) and hexacyanoferrate(III) by spectrometry ICS 13.030.30; 37.040.30 BS ISO 7766:2003 This British Standard was published under the authority of the Standards Policy and Strategy
2、 Committee on 30 June 2003 BSI 30 June 2003 ISBN 0 580 42166 X National foreword This British Standard reproduces verbatim ISO 7766:2003 and implements it as the UK national standard. It supersedes BS ISO 7766-1:1993 which is withdrawn. The UK participation in its preparation was entrusted to Techni
3、cal Committee CPW/42, Photography, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be found in the BS
4、I Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for
5、its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK inter
6、ests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii to v, a blank page, pages 1 to 7 and a back cover. The BSI copyright date displayed in thi
7、s document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments Reference number ISO 7766:2003(E)INTERNATIONAL STANDARD ISO 7766 First edition 2003-06-15 Processing photographic wastes Analysis of cyanides Determination of hexacyanoferrate(ll) and h
8、exacyanoferrate(lll) by spectrometry Effluents de traitement photographiques Analyse des cyanures Dtermination de lhexacyanoferrate(ll) et de lhexacyanoferrate(lll) par spectromtrie BSISO7766:2003ii BSISO7766:2003 iiiContents Page Foreword iv Introduction v 1 Scope 1 2 Normative references . 1 3 Saf
9、ety and operational precautions 1 4 Principle . 2 5 Reactions . 3 6 Reagents and materials 3 7 Apparatus. 4 8 Sampling and sample preparation 4 9 Procedure. 5 10 Expression of results 6 11 Test report 6 Bibliography . 7 BSISO7766:2003iv Foreword ISO (the International Organization for Standardizatio
10、n) 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. Each member body interested in a subject for which a technical committee has been established has the right to be rep
11、resented 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. International Standards a
12、re drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an Internatio
13、nal Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 7766 was pre
14、pared by Technical Committee ISO/TC 42, Photography. BSISO7766:2003 vIntroduction This International Standard is devoted to the analysis of photographic wastes; it encompasses the analysis of complexed iron cyanides (hexacyanoferrates) in photographic effluents. Some of the chemicals specified in th
15、e test procedures are caustic, toxic, or otherwise hazardous. Specific warning, caution and danger notices are noted but, in addition, the normal precautions required during the performance of any chemical procedure should be exercised at all times. In the case of effluents, the photographic laborat
16、ory can best establish conformity to regulations by appropriate chemical analysis. In some cases, in-house analyses will be possible; but the use of an outside laboratory will often be required. Complexed cyanides are used in the bleaching stage of colour photographic processing and it is, therefore
17、, possible for the cyanide portion of the resulting photographic effluent to reach a reportable level. Complexed cyanides contribute to the total cyanides in those tests in which the sample preparation breaks down the complexed cyanides. It is the purpose of this International Standard to provide a
18、method giving an independent determination of the cyanide present as hexacyanoferrate complexes. Due to the chemical behaviour of cyanide complexes, it is not possible to specify a single method for the quantitative determination of complexed cyanides in these effluents. The analysis of cyanide is c
19、overed in various aspects in the following International Standards: ISO 6703-1:1984, Water quality Determination of cyanide Part 1: Determination of total cyanide; ISO 6703-2:1984, Water quality Determination of cyanide Part 2: Determination of easily liberatable cyanide. NOTE 1 Easily liberatable c
20、yanides are defined as substances with cyanide groups and a measurable hydrocyanic acid vapour pressure at pH 4 and room temperature. NOTE 2 Cyanide diffuses as hydrogen cyanide (HCN) at room temperature from a solution at pH 6; the procedure determines cyanide from simple compounds of cyanide and e
21、asily dissociated complexes. BSISO7766:2003blankINTENRATIONAL TSANDADR IS:6677 O3002(E)I SO 3002 All irhgts seredevr 1Processing photographic wastes Analysis of cyanides Determination of hexacyanoferrate(ll) and hexacyanoferrate(lll) by spectrometry 1 Scope This International Standard establishes a
22、test method for the determination of hexacyanoferrate(II) (ferrocyanide) and hexacyanoferrate(III) (ferricyanide), referred to hereafter as Fe(CN) 6 , in photographic processing effluents 1) . Results are reported as hexacyanoferrate, Fe(CN) 6 . 2 Normative references The following referenced docume
23、nts are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 5667-1:1980, Water quality Sampling Part 1: Guidance on the design of sampli
24、ng programmes ISO 5667-2:1991, Water quality Sampling Part 2: Guidance on sampling techniques ISO 5667-3:1994, Water quality Sampling Part 3: Guidance on the preservation and handling of samples ISO 6353-1:1982, Reagents for chemical analysis Part 1: General test methods ISO 6353-2:1983, Reagents fo
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