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1、BRITISH STANDARD BS 3482-10: 1991 Methods of test for Desiccants Part 10: Determination of bulk density (dry basis) NOTEIt is recommended that this Part be read in conjunction with BS 3482-1 “Sampling, and preparation and storage of test samples” which is issued separately. Licensed Copy: sheffieldu
2、n sheffieldun, na, Wed Nov 29 07:32:36 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3482-10:1991 This British Standard, having been prepared under the direction of the Chemicals Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 31 July 199
3、1 BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference CIC/2 Draft for comment 90/55570 DC ISBN 0 580 19711 5 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Chemicals Standards Policy Committ
4、ee (CIC/-) to Technical Committee CIC/2, upon which the following bodies were represented: Chemical Industries Association Ministry of Defence Royal Society of Chemistry Society of British Aerospace Companies Limited Society of Environmental Engineers Amendments issued since publication Amd. No.Date
5、Comments Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 07:32:36 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3482-10:1991 BSI 11-1999i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2Definition1 3Method A. Method for desiccants of grain size greater than 2 mm1 4M
6、ethod B. Method for desiccants of grain size 2 mm or less1 Figure 1 Convenient form of apparatus for the determination of bulk density2 Publication(s) referred toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 07:32:36 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3482-10:19
7、91 ii BSI 11-1999 Foreword This Part of BS 3482 has been prepared under the direction of the Chemicals Standards Policy Committee. This revision of BS 3482 comprises Part 1, which describes procedures for sampling and preparation and storage of test samples and a number of Parts describing methods o
8、f test for desiccants. This revision supersedes BS 3482:1962 which is withdrawn. It differs from BS 3482:1962 in that individual methods have been published in separate Parts and have been generally updated. Some additional methods not included in BS 3482:1962 have also been incorporated. A British
9、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 itself confer immunity from legal obligations. Summary of pages This document comprises a front co
10、ver, an inside front cover, pages i and ii, pages 1 and 2, 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 sheffiel
11、dun, na, Wed Nov 29 07:32:36 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3482-10:1991 BSI 11-19991 1 Scope This Part of BS 3482 describes two methods for the determination of bulk density of desiccants on a dry basis, based on the grain size. NOTEThe titles of the publications referred to in this
12、standard are listed on the inside back cover. 2 Definition bulk density dry basis the mass of desiccant per unit volume after subjection to a shaking process and after correction for moisture content 3 Method A. Method for desiccants of grain size greater than 2 mm 3.1 Principle A fixed mass of desi
13、ccant is shaken in a measuring cylinder until the level remains constant. The bulk density is expressed as the ratio of the mass of desiccant to the volume occupied in the cylinder. 3.2 Apparatus NOTEA convenient form of the apparatus is shown in Figure 1. 3.2.1 Graduated measuring cylinder, capacit
14、y 1 000 mL, complying with BS 604. 3.2.2 Rubber pad 3.3 Procedure 3.3.1 Test portion Weigh, to the nearest 1 g, 500 g of the laboratory sample (see clause 2 of BS 3482-1:1991) into the cylinder (3.2.1). 3.3.2 Determination Shake the cylinder (3.2.1) containing the test portion (3.3.1) up and down, u
15、sing a fall of approximately 25 mm on to the rubber pad (3.2.2) until the level of the test portion remains constant. Read the final volume (V) of the test portion from the graduations on the cylinder. 3.4 Calculation and expression of results The bulk density, corrected for moisture content (dry ba
16、sis) and expressed in grams per millilitre, is given by the following expression: 3.5 Test report The test report shall include the following information. a) A complete identification of the sample. b) A reference to this British Standard method, i.e. method A of BS 3482-10:1991. c) The results, exp
17、ressed in accordance with 3.4. d) Any unusual features noted during the determination. 4 Method B. Method for desiccants of grain size 2 mm or less 4.1 Principle A fixed mass of desiccant is shaken in a measuring cylinder until the level remains constant. The bulk density is expressed as the ratio o
18、f the mass of desiccant to the volume occupied in the cylinder. 4.2 Apparatus 4.2.1 Graduated measuring cylinder, capacity 50 mL, complying with BS 604. 4.2.2 Rubber pad 4.3 Procedure 4.3.1 Test portion Weigh, to the nearest 1 g, 30 g of the laboratory sample (see clause 2 of BS 3482-1:1991) into th
19、e cylinder (4.2.1). 4.3.2 Determination Shake the cylinder (4.2.1) containing the test portion (4.3.1) up and down, using a fall of approximately 25 mm on to the rubber pad (4.2.2) until the level of the test portion remains constant. Read the final volume (V) of the test portion from the graduation
20、s on the cylinder. 4.4 Calculation and expression of results The bulk density, created for moisture content (dry basis) and expressed in grams per millilitre, is given by the following expression: where Vis the final volume of the test portion (in mL). NOTEMoisture content is determined as described
21、 in BS 3482-2. 5005moisture content() V - where Vis the final volume of the test portion (in mL). NOTEMoisture content is determined as described in BS 3482-2. 300.3moisture content() V - - Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 07:32:36 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS
22、3482-10:1991 2 BSI 11-1999 4.5 Test report The test report shall include the following information. a) A complete identification of the sample. b) A reference to this British Standard method, i.e. method B of BS 3482-10:1991. c) The results expressed in accordance with 4.4. d) Any unusual features n
23、oted during the determination. Figure 1 Convenient form of apparatus for the determination of bulk density Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 07:32:36 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3482-10:1991 BSI 11-1999 Publication(s) referred to BS 604, Specification for gradu
24、ated glass measuring cylinders. BS 3482, Methods of test for desiccants. BS 3482-1, Sampling, and preparation and storage of samples. BS 3482-2, Determination of moisture content. Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 07:32:36 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3482-10: 1
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