BS-700-1-1982 ISO-835-1-1981.pdf
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1、BRITISH STANDARD CONFIRMED MARCH 1988 BS 700-1:1982 ISO 835/1- 1981 Graduated pipettes Part 1: Specification for general requirements ISO title: Laboratory glassware Graduated pipettes Part 1: General requirements UDC 542.3:531.732:666.172.7 Licensed Copy: London South Bank University, London South
2、Bank University, Fri Dec 08 13:29:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 700-1:1982 This British Standard, having been prepared under the direction of the Laboratory Apparatus Standards Committee, was published under the authority of the Board of BSI and comes into effect on 31 May 1982 BS
3、I 02-1999 First published May 1937 First revision August 1952 Second revision June 1962 Third revision November 1976 Fourth revision, in Parts, May 1982 The following BSI references relate to the work on this standard: Committee reference LBC/27 Draft for comment 79/54288 DC ISBN 0 580 12742 7 Coope
4、rating organizations The Laboratory Apparatus Standards Committee, under whose direction this British Standard was prepared, consists of representatives from the following: Agricultural Research Council Association for Science Education British Educational Equipment Association British Laboratory Wa
5、re Association* British Lampblown Scientific Glassware Manufacturers Association Ltd.* British Pharmacopoeia Commission Chemical Industries Association Department of Health and Social Security* Department of Industry (Laboratory of the Government Chemist)* Institute of Petroleum Ministry of Defence*
6、 Pharmaceutical Society of Great Britain Royal Society of Chemistry Scientific Instrument Manufacturers Association Society of Chemical Industry* Society of Glass Technology Standardization of Tar Products Tests Committee The organizations marked with an asterisk in the above list, together with the
7、 following, were directly represented on the Technical Committee entrusted with the preparation of this British Standard: Association of Clinical Biochemists Glass Manufacturers Federation Institute of Medical Laboratory Sciences Coopted member Amendments issued since publication Amd. No.Date of iss
8、ueComments Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 13:29:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 700-1:1982 BSI 02-1999i Contents Page Cooperating organizations Inside front cover National foreword ii 1Scope and field of application 1 2Reference
9、s 1 3Basis of adjustment1 4Volumetric accuracy 1 5Types of pipette 1 6Limits of volumetric error 1 7Construction 2 8Graduation and figuring 2 9Setting of the meniscus 4 10Inscriptions 4 11Visibility of graduation lines, figures and inscriptions 4 12Colour coding 4 Annex A Relationship between volume
10、tric capacity and limits of error for class A pipettes as required by 4.4 of ISO 3846 Annex B Relationship between limits of volumetric error and meniscus diameter for class A pipettes as required by 4.7 of ISO 3847 Figure 1 Length and sequence of graduation lines 5 Figure 2 Position of graduation l
11、ines 5 Table 1 Capacities, sub-divisions and limits of error 1 Table 2 Dimensions 3 Table 3 Figuring of graduation lines 4 Publications referred to Inside back cover Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 13:29:48 GMT+00:00 2006, Uncontrolled Copy, (c)
12、BSI BS 700-1:1982 ii BSI 02-1999 National foreword This Part of this British Standard has been prepared under the direction of the Laboratory Apparatus Standards Committee. It is identical with ISO 835/1 “Laboratory glassware Graduated pipettes Part 1: General requirements” published in 1981 by the
13、International Organization for Standardization (ISO). BS 700 was originally published in 1937 and first revised in 1952 under the title “Graduated pipettes and one-mark cylindrical pipettes”. The standard was again revised in 1962, when the one-mark cylindrical pipettes were omitted from it, and acc
14、ount was taken of international standardization work in progress at that time. In 1968 ISO/R 835 was published which covered graduated pipettes types I and II, and BS 700 was revised in 1976 to take into account this ISO Recommendation and amendments to it that were under consideration. The earlier
15、edition of BS 700 included requirements for a type III pipette which was adjusted for content from the jet to any graduation line. This was omitted from the 1976 revision because of lack of demand and was replaced by another pipette, also designated type III, but adjusted for delivery from the zero
16、line (at the top) to the jet. In addition, the 1976 revision included requirements for a blowout pipette, adjusted for delivery from the highest graduation line (at the top) to the jet, but with the last drop expelled by blowing. The method of use of this pipette is the responsibility of the user an
17、d for this reason alternative scales were permitted; one with the zero at the jet and the other with the zero at the highest graduation line, which reflects the general method of using the pipette as a dispenser. Pipettes of types III and IV were of class B accuracy only, and delivery times for type
18、s I and II pipettes were reduced. Proposals made by the UK for further revision of ISO/R 835 to include shorter delivery times for types I and II pipettes were accepted, and in 1981 the ISO Recommendation was revised and published in four Parts, ISO 835/1 to 835/4. The equivalent British Standards f
19、or ISO 835/2 and ISO 835/4 are BS 700-2 and BS 700-3 respectively. The Technical Committee responsible for this British Standard, whilst approving ISO 835/3 as an international standard, decided that there should be no British Standard corresponding to ISO 835/3 because graduated pipettes having a 1
20、5 s waiting time are not used in the UK and its markets. The principal differences between the 1976 edition and this edition include the introduction of a 0.5/0.01 ml pipette and a 25/0.01 ml pipette, both of class A accuracy. The blow-out pipettes are no longer designated as type IV and the alterna
21、tive scale arrangement, with the zero at the top, for these pipettes has been deleted. The maximum scale lengths of the types 2, 3 and blow-out pipettes have been increased by 10 %, and the ranges of the delivery times for class B types 1, 2 and 3 have been widened. This Part of this standard, toget
22、her with Parts 2 and 3, supersedes BS 700:1976 which is withdrawn. Terminology and conventions. The text of the international standard has been approved as suitable for publication as a British Standard without deviation. Some terminology and certain conventions are not identical with those used in
23、British Standards; attention is drawn especially to the following. The comma has been used throughout as a decimal marker. In British Standards it is current practice to use a full point on the baseline as the decimal marker. Wherever the words “International Standard” appear, referring to this stan
24、dard, they should be read as “British Standard”. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 13:29:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 700-1:1982 BSI 02-1999iii The Technical Committee has reviewed the provisions of ISO 1769, to which reference
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