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1、BRITISH STANDARD BS 2713:1966 Incorporating Amendment No. 1 Specification for 2-Ethoxyethanol (Ethylene glycol monoethyl ether) Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 08:38:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2713:1966 This British Standard
2、, having been approved by the Chemicals Industry Standards Committee and endorsed by the Chairman of the Chemical Divisional Council, was published under the authority of the General Council on 28 October 1966 BSI 12-1999 First published May 1956 First revision October 1966 The following BSI referen
3、ces relate to the work on this standard: Committee references CIC/4 and CIC/4/5 Draft for comment D65/4963 ISBN 0 580 35991 3 Co-operating organizations The Chemicals Industry Standards Committee, under whose supervision this British Standard was prepared, consists of representatives from the follow
4、ing Government departments and industrial organizations: Board of Trade British Iron & Steel Federation Chemical Industries Association* Fertilizer Manufacturers Association Gas Council Institute of Vitreous Enamellers Institution of Gas Engineers Ministry of Defence, Army Department* Ministry of He
5、alth National Sulphuric Acid Association Royal Institute of Public Health & Hygiene The Government department and industrial organization marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the preparation of this British
6、Standard: British Pharmacopia Commission British Plastics Federation Ministry of Defence, Navy Department Ministry of Technology Laboratory of the Government Chemist Oil and Colour Chemists Association Pharmaceutical Society of Great Britain Research Association of British Paint, Colour & Varnish Ma
7、nufacturers Royal Institute of Chemistry Society for Analytical Chemistry Society of Chemical Industry Society of Motor Manufacturers and Traders Ltd. Toilet Preparations Federation Amendments issued since publication Amd. No.Date of issueComments 7628May 1993Indicated by a sideline in the margin Li
8、censed Copy: London South Bank University, London South Bank University, Tue Dec 12 08:38:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2713:1966 BSI 12-1999i Contents Page Co-operating organizationsInside front cover Forewordii 1Scope1 2Description1 3Colour1 4Relative density1 5Distillation rang
9、e1 6Miscibility with water1 7Water1 8Alkalinity or acidity1 9Sampling and size of sample1 Appendix A Limit test for colour2 Appendix B Method for the determination of distillation range2 Appendix C Test for miscibility with water3 Appendix D Method for the detection of alkalinity or determination of
10、 acidity3 Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 08:38:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2713:1966 ii BSI 12-1999 Foreword This standard makes reference to the following British Standards: BS 593, Laboratory thermometers. BS 604, Graduate
11、d measuring cylinders. BS 612, Nessler cylinders. BS 658, Apparatus for the determination of distillation range. BS 1792, One-mark volumetric flasks. BS 2511, Methods for the determination of water (Karl Fischer method). BS 3591, Industrial methylated spirits. BS 3978, Water for laboratory use. BS 4
12、591, Method for determination of distillation characteristics of organic liquids (other than petroleum products). This standard forms one of a series of British Standards for solvents and allied products. The preparation of this standard was authorized originally by the Fine Chemicals Industry Stand
13、ards Committee (now merged in the Chemicals Industry Standards Committee). This British Standard was first issued in 1956. In the present revision the limits for relative density, water content and acidity have been made more stringent. The requirements in respect of distillation range now specify i
14、nitial boiling point and dry point. A specific colour requirement has been included. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of its
15、elf confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 3 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendm
16、ent table on the inside front cover. Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 08:38:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2713:1966 BSI 12-19991 1 Scope This British Standard specifies requirements for 2-ethoxyethanol suitable for industrial pu
17、rposes. 2 Description British Standard 2-ethoxyethanol shall be clear and free from matter in suspension, and shall consist essentially of 2-ethoxyethanol, C2H5O.CH2.CH2OH. 3 Colour The colour of the material shall not exceed 15 Hazen units when measured by the method described in Appendix A or by a
18、 suitable instrumental method. 4 Relative density The relative density1) of the material at any one of the following temperatures shall be within the appropriate values as shown below: 5 Distillation range When the material is distilled by the method described in Appendix B, the initial boiling poin
19、t at 760 mmHg pressure shall not be below 133.5 C and the dry point at 760 mmHg pressure shall not be above 136.5 C. 6 Miscibility with water The material shall not show any opalescence when mixed with distilled water by the method described in Appendix C. 7 Water The material shall not contain more
20、 than 0.1 % by mass of water, determined by the method described in Clause 2 of BS 2511:19702) and using 20 ml of the material. 8 Alkalinity or acidity The material shall not be alkaline to phenolphthalein and shall not contain more than 50 parts per million by mass of acid, calculated as acetic aci
21、d CH3COOH, determined by the method described in Appendix D. 9 Sampling and size of sample A representative sample of the material measuring not less than one litre shall be taken from the bulk for the purpose of examination in accordance with this specification. The sample shall be placed in a clea
22、n, dry and air-tight glass-stoppered bottle of such a size that it is nearly filled by the sample. When it is necessary to seal the container, care shall be taken to avoid the risk of contaminating the contents in any way. NOTEThe British Standards Institution is the owner of a registered certificat
23、ion trade mark. This is shown below, enclosed in the words “Approved to British Standard”. This mark can be used only by manufacturers licensed under the certification mark scheme operated by the BSI. The presence of this mark on or in relation to a product is an assurance that the goods have been p
24、roduced to comply with the requirements of the British Standard under a system of supervision, control and testing operated during manufacture and including periodical inspection at the manufacturers works in accordance with the certification mark scheme of the BSI. Further particulars of the terms
25、of licence may be obtained from the Director, British Standards Institution, 2 Park Street, London W.1. 1) Formerly “specific gravity”: “relative density” is the term adopted for this concept, with water as the reference substance, by the International Organization for Standardization (ISO). Tempera
26、tureRelative density C 15.5/15.5 20/20 25/25 min. 0.934 0.931 0.928 max. 0.937 0.934 0.931 2) BS 2511, “Methods for the determination of water (Karl Fischer method)”. Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 08:38:55 GMT+00:00 2006, Uncontrolled Copy, (c)
27、 BSI BS 2713:1966 2 BSI 12-1999 Appendix A Limit test for colour A.1 Apparatus a) Two Nessler cylinders3), 100 ml capacity. b) One-mark volumetric flask4), 500 ml capacity. c) One-mark volumetric flask4), 250 ml capacity. A.2 Reagents The reagents used shall be of a recognized analytical reagent qua
28、lity. Water complying with BS 39785) shall be used throughout. a) Cobaltous chloride, hexahydrate. b) Hydrochloric acid, concentrated, d = 1.18. c) Chloroplatinic acid reagent. Dissolve 250 mg of platinum in a small quantity of aqua regia contained in a glass or porcelain basin by heating on a water
29、 bath. When the metal has dissolved evaporate the solution to dryness. Add 1 ml of the hydrochloric acid and again evaporate to dryness. Repeat this operation twice more. A.3 Preparation of colour standard Dissolve 0.50 g of the cobaltous chloride hexahydrate and the whole of the chloroplatinic acid
30、 (prepared as described above) in 50 ml of the hydrochloric acid. Warm, if necessary, to obtain a clear solution and after cooling, pour into the 500 ml volumetric flask. Dilute with water to the mark. Pipette 7.5 ml of this solution into the 250 ml volumetric flask. Dilute with water up to the grad
31、uation mark. This diluted solution has a colour of 15 Hazen units and should always be freshly prepared. A.4 Procedure Fill one of the Nessler cylinders to the mark with the sample, and the other with the colour standard. Using a white background, compare the colours. Appendix B Method for the deter
32、mination of distillation range B.1 Apparatus The apparatus required is described in BS 6586) and comprises: a) Distillation flask of 100 ml distillation capacity conforming to BS 6586). b) Thermometer No. F150C/100 complying with the requirements of BS 5937). c) Condenser, Type 1, complying with the
33、 requirements of BS 6586). d) Draught screen, Type C, and non-asbestos heat-resistant flask support sheet with 50 mm diameter central hole, complying with the requirements of BS 6586). B.2 Procedure Assemble the apparatus as described in BS 6586). Measure 100 ml of the sample into the distillation f
34、lask from a graduated measuring cylinder8) and add a few anti-bumping granules. Place the flask, thermometer and a suitable receiver in position and ensure that the condenser has a steady supply of water. Adjust the rate of heating so that the first drop of distillate falls from the end of the conde
35、nser in 7 to 12 minutes. Read the temperature at the instant the first drop falls from the end of the condenser and record as the observed initial boiling point. Further adjust the rate of heating so that the distillate is collected at the rate of 3 to 4 ml per minute. Read the temperature indicated
36、 at the instant the last drop of liquid evaporates from the lowest point in the distillation flask and record as the observed dry point. Disregard any liquid on the side of the flask. B.3 Corrections to be applied to the observed temperatures i) If the thermometer gives incorrect readings at the obs
37、erved initial boiling point or observed dry point, correct the readings by subtracting the amount of error if the thermometer is reading high, or adding the amount of error if the thermometer is reading low. ii) Read the barometer and apply the corrections as described in BS 45919). iii) When the co
38、rrected barometric pressure deviates from 760 mmHg, apply further corrections to the observed temperatures by subtracting 0.041 degC for every millimetre above 760 mm or adding 0.041 degC for every millimetre below 760 mm. NOTEThese last corrections are valid only for pressures above 700 mmHg. 3) BS
39、 612, “Nessler cylinders”. 4) BS 1792, “One-mark volumetric flasks”. 5) BS 3978, “Water for laboratory use”. 6) BS 658, “Apparatus for the determination of distillation range”. 7) BS 593, “Laboratory thermometers”. 8) BS 604, “Graduated measuring cylinders”. 9) BS 4591, “Method for determination of
40、distillation characteristics of organic liquids (other than petroleum products)”. Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 08:38:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2713:1966 BSI 12-19993 Appendix C Test for miscibility with water To 5 ml of
41、the sample contained in a 100 ml Nessler cylinder, add 95 ml of distilled water, mix thoroughly and adjust to 20 C. Examine vertically for opalescence against a black background with side illumination, using as a standard a similar cylinder containing 100 ml of distilled water. Appendix D Method for
42、 the detection of alkalinity or determination of acidity D.1 Reagents The reagents used shall be of a recognized analytical reagent quality. Water complying with BS 397810) shall be used throughout. a) Sodium hydroxide, 0.1N solution. b) Phenolphthalein indicator. Dissolve 0.5 g of phenolphthalein i
43、n 100 ml of ethanol11)(95 % by volume) and make faintly pink by the addition of dilute sodium hydroxide solution. D.2 Procedure Place 100 ml of water and a few clean anti-bumping granules into a 500 ml conical flask of borosilicate glass and boil gently for five minutes to eliminate carbon dioxide.
44、Cool slightly and add 100 ml of the sample. Boil gently for a further five minutes. At the end of this period close the neck of the flask with a stopper carrying a soda-lime tube and allow to cool. When cold, remove the stopper, add 0.5 ml of the phenolphthalein indicator and examine for alkalinity:
45、 if not alkaline, titrate with the sodium hydroxide solution using a microburette. D.3 Calculation Acidity, calculated as acetic acid, CH3COOH, parts per million by mass = where T = volume, in millilitres, of 0.1N sodium hydroxide solution used and d = relative density of the sample. 10) BS 3978, “W
46、ater for laboratory use”. 11) Ethanol may be replaced by industrial methylated spirits, 95 % (v/v), complying with the requirements of BS 3591. It should be noted that the use of industrial methylated spirits is governed by the Methylated Spirits Regulations, 1983 (S.I. 1983, No. 252). It is not per
47、missible to use duty-free ethanol, received under the provisions of The Alcoholic Liquor Duties Act 1979, Section 10, for purposes for which industrial methylated spirits is an acceptable alternative. 60T d - - Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 08:
48、38:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2713:1966 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It
49、 is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure 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 responsible, the identity of which can be found on the inside front cover. Tel: 020 8996 9000. Fax: 020 8996 7400. BSI offers