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1、BRITISH STANDARD BS EN ISO 10101-1:1998 BS 3156-11.3.1: 1994 Implementing Amendment No. 1 to BS 3156-11.3.1:1994 ISO 10101-1:1993 (renumbers the BS as BS EN ISO 10101-1: 1998), not published separately Natural gas Determination of water by the Karl Fischer method Part 1: Introduction The European St
2、andard EN ISO 10101-1:1998 has the status of a British Standard ICS 75.060 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 15:35:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 10101-1:1998 This British Standard, having been prepared under the direction of the Petroleum Standards Policy C
3、ommittee, was published under the authority of the Standards Board and comes into effect on 15 March 1994 BSI 05-1999 The following BSI references relate to the work on this standard: Committee reference PTC/15 Draft for comment 92/527 10 DC ISBN 0 580 22955 6 Committees responsible for this British
4、 Standard The preparation of this British Standard was entrusted by the Petroleum Standards Policy Committee (PTC/-) to Technical Committee PTC/15 upon which the following bodies were represented: British Compressed Gases Association British Gas plc Department of Trade and Industry (Gas and Oil Meas
5、urement Branch) Department of Trade and Industry (National Engineering Laboratory) Institute of Petroleum Amendments issued since publication Amd. No.DateComments 10051July 1998Implementation of EN ISO 10101-1:1998 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 15:35:10 GMT+00:00 2006, Uncon
6、trolled Copy, (c) BSI BS EN ISO 10101-1:1998 BSI 05-1999i Contents Page Committees responsibleInside front cover National forewordii Foreword2 1Scope3 2Normative references3 3Principle3 4Reactions and interferences3 5Sampling4 Annex A (informative) Bibliography5 Annex ZA (normative) Normative refere
7、nces to international publications with their relevant European publications5 List of referencesInside back cover Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 15:35:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 10101-1:1998 ii BSI 05-1999 National foreword This British Standard h
8、as been prepared under the direction of the Petroleum Standards Policy Committee and is the English language version of EN ISO 10101-1:1998 Natural gas Determination of water by the Karl Fischer method Part 1: Introduction published by the European Committee for Standardization (CEN). It is identica
9、l with ISO 10101-1:1993 published by the International Organization for Standardization (ISO). International Standard ISO 10101-1 was prepared by Technical Committee ISO/TC 193, Natural gas, Subcommittee SC 1, Analysis of natural gas, in which the United Kingdom participated. ISO 10101 consists of t
10、he following Parts, under the general title Natural gas Determination of water by the Karl Fischer method. Part 1: Introduction; Part 2: Titration procedure; Part 3: Coulometric procedure. Annex A of this Subsection of BS 3156 is for information only. The Technical Committee has reviewed the provisi
11、ons of ISO 6712:1982, to which normative reference is made in the text, and has decided that they are acceptable for use in conjunction with this standard. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their
12、correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references International standardCorresponding British Standard BS 3156 Analysis of fuel gases Part 11 Method for non-manufactured gases Section 11.3 Determination of water in nat
13、ural gas by the Karl Fischer method ISO 10101-2:1993Subsection 11.3.2:1994 Titration method (Identical) ISO 10101-3:1993Subsection 11.3.3:1994 Coulometric method (Identical) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN ISO title page, pages 2
14、to 6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 15:35:10 GMT+00:00 2006, Uncontro
15、lled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 10101-1 March 1998 ICS 75.060 Descriptors: See ISO document English version Natural gas Determination of water by the Karl Fischer method Part 1: Introduction (ISO 10101-1:1993) Gaz naturel Dosage de leau par la mthode de Ka
16、rl Fischer Partie 1: Introduction (ISO 10101-1:1993) Erdgas Bestimmung des Wassergehaltes nach Karl Fischer Teil 1: Einfhrung (ISO 10101-1:1993) This European Standard was approved by CEN on 22 February 1998. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate t
17、he conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists i
18、n three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies
19、of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung
20、Central Secretariat: rue de Stassart 36, B-1050 Brussels 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members Ref. No. EN ISO 10101-1:1998 E Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 15:35:10 GMT+00:00 2006, Uncontrolled Copy, (c)
21、BSI EN ISO 10101-1:1998 BSI 05-1999 2 Foreword The text of the International Standard from Technical Committee ISO/TC 193, Natural gas, of the International Organization for Standardization (ISO) has been taken over as a European Standard by CEN/CS. This European Standard shall be given the status o
22、f a national standard, either by publication of an identical text or by endorsement, at the latest by September 1998, and conflicting national Standards shall be withdrawn at the latest by September 1998. According to CEN/CENELEC Internal Regulations, the following countries are bound to implement t
23、his European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the International Standard ISO 10101-1:1993 has be
24、en approved by CEN as a European Standard without any modification. NOTENormative references to International Standards are listed in Annex ZA (normative). Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 15:35:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 10101-1:1993(E) BSI 05-19993 WARN
25、ING Local safety regulations must be taken into account, when the equipment is located in hazardous areas. Due to the toxicity and odour of pyridine, the user should ensure that there is adequate ventilation. 1 Scope This part of ISO 10101 specifies general requirements for the determination of wate
26、r in natural gas using the Karl Fischer method. ISO 10101-2 and ISO 10101-3 specify two individual methods of determination, a titration procedure and a coulometric procedure, respectively. 2 Normative references The following standards contain provisions which, through reference in this text, const
27、itute provisions of this part of ISO 10101. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISO 10101 are encouraged to investigate the possibility of applying the most recent editions of the standa
28、rds indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 6712:1982, Gas analysis Sampling and transfer equipment for gases supplying an analytical unit. ISO 10101-2:1993, Natural gas Determination of water by the Karl Fischer method Part 2: Titra
29、tion procedure. ISO 10101-3:1993, Natural gas Determination of water by the Karl Fischer method Part 3: Coulometric procedure. 3 Principle Reaction of water present in the test sample with iodine and sulfur-dioxide in a pyridine/methanol mixture (Karl Fischer reagent). 3.1 Principle of the first met
30、hod (ISO 10101-2) A measured volume of gas is passed through a cell containing a relatively small volume of absorbent solution. Water in the gas is dissolved in the absorbent solution and subsequently titrated with Karl Fischer reagent, the endpoint being detected voltametrically. 3.2 Principle of t
31、he second method (ISO 10101-3) A measured volume of gas is passed through a cell containing anhydrous, previously titrated, anodic solution. The iodine required for the titration of the dissolved water is coulometrically produced from the iodide present in the solution by the reaction 2I fF I2 + 2e
32、4 Reactions and interferences CH3OH + SO2 + R3N F R3NHSO3CH3 H2O + I2 + R3NHSO3CH3 + 2R3N F R3NHSO4CH3 + 2R3NHI NOTE 1Methanol may be replaced by 2-methoxyethanol (ethylene glycol monomethylether) and pyridine (R3N) may be replaced by any other suitable basic nitrogen compound. Various gas component
33、s react with the Karl Fischer reagent and can give rise to erroneous results. Such components are oxidizing and reducing agents, e.g. hydrogen sulfide, mercaptans and certain basic nitrogeneous substances. Hydrogen sulfide and mercaptans are present in some natural gases. If their concentration is l
34、ess than 20 % of the water content, interference due to their presence shall be corrected as follows: where A(H2O)ais the actual water content, in milligrams per cubic meter at 273,15 K (0 C) and 101,325 kPa (1 atm); A(H2O)is the observed or measured water content, in milligrams per cubic meter at 2
35、73,15 K (0 C) and 101,325 kPa (1 atm); A(S as H2S) is the measured sulfur as hydrogen sulfide, in milligrams per cubic meter at 273,15 K (0 C) and 101,325 kPa (1 atm); A(S as RSH) is the measured sulfur as mercaptans in the gas, in milligrams per cubic meter at 273,15 K (0 C) and 101,325 kPa (1 atm)
36、. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 15:35:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 10101-1:1993(E) 4 BSI 05-1999 At higher contents of H2S and RSH this method is not applicable. NOTE 2The sulfur present as hydrogen sulfide and mercaptans can be determined by potentiomet
37、ric titration (see ISO 6362-3) or by any other suitable method. 5 Sampling Carry out sampling according to the general sampling guidelines given in ISO 6712. During sampling, ensure that the temperature of the gas stream is above the dew-point temperature. If necessary the sampling equipment should
38、be heated. All parts in contact with the gas shall be of steel or glass. The ends of pipes shall fit securely together and the connecting pieces shall be made of fluoro-elastomers. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 15:35:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 10101-1:
39、1993(E) BSI 05-19995 Annex A (informative) Bibliography 1 ISO 760:1978, Determination of water Karl Fischer method (General method). 2 ISO 6326-3:1989, Natural gas Determination of sulfur compounds Part 3: Determination of hydrogen sulfide, mercaptan sulfur and carbonyl sulfide sulfur by potentiomet
40、ry. 3 FISHER, K. Neues Verfahren zur mass-analytischen Bestimmung des Wassergehaltes von Flssigkeiten und festen Krpern. Angewandte Chemie 48 (1935), 26, p. 394. 4 KAESLER, H. Direkte Bestimmung des Wassergehaltes in Gasen nach Karl Fischer. gwf-gas erdgas 125 (1984), 3, pp. 125-131. 5 SCHOLZ, E. Ka
41、rl Fischer Titration, Methoden zur Wasserbestimmung. Springer-verslag, Berlin, Heidelberg, 1984. Annex ZA (normative) Normative references to international publications with their relevant European publications This European Standard incorporates by dated or undated reference, provisions from other
42、publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or re
43、vision. For undated references the latest edition of the publication referred to applies. PublicationYearTitleENYear ISO 10101-21993Natural gas Determination of water by the Karl Fischer method Part 2: Titration procedure EN ISO 10101-21998 ISO 10101-31993Natural gas Determination of water by the Ka
44、rl Fischer method Part 3: Coulometric procedure EN ISO 10101-31998 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 15:35:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 6 blank Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 15:35:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 1
45、0101-1:1998 BSI 05-1999 List of references See national foreword. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 15:35:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 10101-1:1998 BS 3156-11.3.1: 1994 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is t
46、he independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure
47、that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsibl
48、e, the identity of which can be found on the inside front cover. Tel: 020 8996 9000. Fax: 020 8996 7400. BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards. Buying standards Orders for all BSI, internati
49、onal and foreign standards publications should be addressed to Customer Services. Tel: 020 8996 9001. Fax: 020 8996 7001. In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise requested. Information on standards BSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service. Var
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