欢迎来到麦多课文档分享! | 帮助中心 海量文档,免费浏览,给你所需,享你所想!
麦多课文档分享
全部分类
  • 标准规范>
  • 教学课件>
  • 考试资料>
  • 办公文档>
  • 学术论文>
  • 行业资料>
  • 易语言源码>
  • ImageVerifierCode 换一换
    首页 麦多课文档分享 > 资源分类 > PDF文档下载
    分享到微信 分享到微博 分享到QQ空间

    BS 4651-0-1987 Ammonia solution - Methods for sampling《氨溶液 第0部分 取样方法》.pdf

    • 资源ID:544542       资源大小:380.96KB        全文页数:10页
    • 资源格式: PDF        下载积分:10000积分
    快捷下载 游客一键下载
    账号登录下载
    微信登录下载
    二维码
    微信扫一扫登录
    下载资源需要10000积分(如需开发票,请勿充值!)
    邮箱/手机:
    温馨提示:
    如需开发票,请勿充值!快捷下载时,用户名和密码都是您填写的邮箱或者手机号,方便查询和重复下载(系统自动生成)。
    如需开发票,请勿充值!如填写123,账号就是123,密码也是123。
    支付方式: 支付宝扫码支付    微信扫码支付   
    验证码:   换一换

    加入VIP,交流精品资源
     
    账号:
    密码:
    验证码:   换一换
      忘记密码?
        
    友情提示
    2、PDF文件下载后,可能会被浏览器默认打开,此种情况可以点击浏览器菜单,保存网页到桌面,就可以正常下载了。
    3、本站不支持迅雷下载,请使用电脑自带的IE浏览器,或者360浏览器、谷歌浏览器下载即可。
    4、本站资源下载后的文档和图纸-无水印,预览文档经过压缩,下载后原文更清晰。
    5、试题试卷类文档,如果标题没有明确说明有答案则都视为没有答案,请知晓。

    BS 4651-0-1987 Ammonia solution - Methods for sampling《氨溶液 第0部分 取样方法》.pdf

    1、BRITISH STANDARD BS 4651-0: 1987 Ammonia solution Part 0: Methods for sampling UDC 546.171.1:620.113.4BS4651-0:1987 This British Standard, having been prepared under the directionof the Chemicals Standards Committee, was published under the authority ofthe Board of BSI and comes intoeffect on 23Dece

    2、mber1987 BSI 12-1999 First published February 1971 First part revision as Part 0 December 1987 The following BSI references relate to the work on this standard: Committee reference CIC/21 Draft for comment 86/54200 DC ISBN 0 580 16144 7 Committees responsible for this British Standard The preparatio

    3、n of this British Standard was entrusted by the Chemicals Standards Committee (CIC/-) to Technical Committee CIC/21, upon which the following bodies were represented: British Coal British Pharmacopoeia Commission British Sulphate of Ammonia Federation Ltd. Chemical Industries Association Fertiliser

    4、Manufacturers Association Ltd. Ministry of Defence Textile Institute Amendments issued since publication Amd. No. Date of issue CommentsBS4651-0:1987 BSI 12-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Sampling of ammonia solution 1 Appendix A Structure of B

    5、S 4651 3 Table 1 Structure of revision of BS 4651:1971 3 Publications referred to Inside back coverBS4651-0:1987 ii BSI 12-1999 Foreword This Part of BS4651 has been prepared under the direction of the Chemicals Standards Committee. It explains the revision of the1971 edition into Parts. Methods for

    6、 the sampling of ammonia solution are given, which supersede those given in Appendix A of BS4651:1971 which has been deleted by amendment. It is intended to publish eight Parts of BS4651, which will collectively supersede the1971 edition. As each Part is published, the corresponding clause of BS4651

    7、:1971 will be withdrawn by amendment. The relationship of these Parts to the1971 edition of this standard and to International Standards is summarized inTable 1. For many years the UK has participated in the work of TC47, Chemistry, of the International Organization for Standardization (ISO). Two te

    8、st methods, applicable to ammonia solution for industrial use, were approved by the UK and, in accordance with BSI policy, are published as separate, dual-numbered Parts of BS4651 (seeTable 1). NOTEThe term “ammonia solution” is used to describe grades of product containing between25.0% to35.0% (m/m

    9、) ammonia. 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 itself confer immunity from legal obligations. Summary of pages This document

    10、 comprises a front cover, an inside front cover, pagesi andii, pages1 to4, 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.BS4651-0:1987 BSI 12

    11、-1999 1 1 Scope This Part of BS4651 describes methods for the sampling of ammonia solution from bulk containers, drums, carboys and bottles. The Parts of this edition of BS4651 together with the corresponding clauses of the1971 edition and any corresponding International Standards are summarized inA

    12、ppendix A. 2 Sampling of ammonia solution 2.1 Safety precautions Use appropriate protective clothing (gas-tight goggles, PVC gloves, apron and boots) for carrying out any bulk sampling operation involving ammonia solution. Use self-contained air sets and eye wash bottles, which should be readily ava

    13、ilable for use if needed. Smoking and sources of ignition are prohibited during the sampling of ammonia solution. NOTEMixtures of ammonia gas and air can explode, if ignited, when the proportion of ammonia gas is within the limits16% to27% (V/V). Keep all containers cool and apply additional cooling

    14、 if possible before removing stoppers and bungs. 2.2 Sampling from bulk containers WARNING. DO NOT USE COMPRESSED AIR TO DISCHARGE AMMONIA SOLUTION FROM BULK CONTAINERS. Whenever it is necessary to take a sample of ammonia solution from any bulk container, cool the container and vent it to the atmos

    15、phere before removing any stopper or cover. Take care to ensure that any escaping ammonia gas is discharged at a point remote from personnel. Withdraw samples from the tank by means of a sampling “thief” made of25mm diameter polyethylene or polypropylene tubing,2m long and tapered at each end to10mm

    16、 diameter over a minimum of100mm tube length. Transfer samples taken from tanks immediately into clean glass screw-stoppered bottles, cool them immediately and keep them in a cool place (e.g.a cold water bath or fridge) until required for analysis. Use the following procedure. a) Take two consecutiv

    17、e500mL samples and discard both in order to clear the sampling tube and bottle and to obtain representative material. b) Take the sample required in a bottle fitted with an internal solid screw-stopper and rubber gasket. Tighten the stopper as soon as the sample is in the bottle. 2.3 Sampling from d

    18、rums, carboys and bottles 2.3.1 General. Do not use suction during the withdrawal of the sample, especially with concentrated solutions, since reduction of pressure readily depletes the solution of ammonia gas. 2.3.2 Drums WARNING. DO NOT USE COMPRESSED AIR TO DISCHARGE AMMONIA SOLUTION FROM DRUMS.

    19、Sample from drums by pouring, by siphoning or by means of a polyethylene or polypropylene sampling “thief”. If the sample is to be obtained by pouring, use a specially constructed elevated platform to hold the drum, and a screw-in pourer and funnel to facilitate transfer and reduce the risk from spl

    20、ashing. If the sample is to be obtained by siphoning, use a suitable siphon constructed from stainless steel, polyethylene, polypropylene or glass. Start the siphon by applying a slight air pressure to the drum, e.g.from a hand bellows or bulb, provided that the end of the delivery tube is below the

    21、 level of the liquid in the drum. If a polyethylene or polypropylene sampling “thief” is used to draw a sample, use the procedure described in2.2. 2.3.3 Carboys WARNING. DO NOT USE COMPRESSED AIR TO DISCHARGE AMMONIA SOLUTION FROM CARBOYS. Sample from carboys by pouring, by siphoning, by the use of

    22、a polyethylene or polypropylene sampling “thief” or by the use of a hand-operated pump. If the sample is to be obtained by pouring, use a properly constructed carboy tilter. If the sample is to be obtained by siphoning, use a suitable siphon constructed from stainless steel, polyethylene, polypropyl

    23、ene or glass. Start the siphon by applying a slight air pressure by means of a hand bellows or bulb, provided that the end of the delivery tube is below the level of the liquid in the carboy. NOTEPolyethylene or polypropylene siphons incorporating bellows for priming are commercially available. If a

    24、 polyethylene or polypropylene sampling “thief” is used to draw a sample, use the procedure described in2.2. Do not use electrically-operated pumps.BS4651-0:1987 2 BSI 12-1999 2.3.4 Bottles. Sample from bottles by simple pouring action. In the laboratory, carry out sampling in a fume cupboard. WARNI

    25、NG. DO NOT PIPETTE AMMONIA SOLUTION BY MOUTH. USE ONE OF THE SUITABLE DEVICES COMMERCIALLY AVAILABLE.BS4651-0:1987 BSI 12-1999 3 Appendix A Structure of BS 4651 The Parts of BS4651 are listed inTable 1 together with the corresponding clauses of the1971 edition and any corresponding International Sta

    26、ndards. Table 1 Structure of revision of BS4651:1971 Current revision of BS4651 (inParts) Title Corresponding Clause of BS4651:1971 Corresponding International Standard Part 0 Methods for sampling Part 1 a Method for determination of density at20 C Clause 2 Part 2 Method for determination of ammonia

    27、 content Clause 3 ISO 7108 Part 3 Method for determination of residue on evaporation Clause 4 ISO 7109 Part 4 a Method for determination of residue after heating at850 C Clause 4 Part 5 a Method for determination of iron content Clause 5 Part 6 a Methods for determination of chloride content Clause

    28、6 Part 7 a Method for determination of carbon dioxide content Clause 7 a In preparation.4 blankBS4651-0:1987 BSI 12-1999 Publications referred to See alsoAppendix A. ISO 7108, Ammonia solution for industrial use Determination of ammonia content Titrimetric method. ISO 7109, Ammonia solution for indu

    29、strial use Determination of residue after evaporation at105C Gravimetric method. BS 4651-0: 1987 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe and

    30、 at the international level. It is incorporated by Royal Charter. Revisions BritishStandards are updated by amendment or revision. Users of BritishStandards 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

    31、services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this BritishStandard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel:02089969000. Fax:02089967400. BSI offers members an indivi

    32、dual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards. Buying standards Orders for all BSI, international and foreign standards publications should be addressed to Customer Services. Tel:02089969001. Fax:02089967001. In response to or

    33、ders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as BritishStandards, unless otherwise requested. Information on standards BSI provides a wide range of information on national, European and international standards through its Libra

    34、ry and its Technical Help to Exporters Service. Various BSI electronic information services are also available which give details on all its products and services. Contact the Information Centre. Tel:02089967111. Fax:02089967048. Subscribing members of BSI are kept up to date with standards developm

    35、ents and receive substantial discounts on the purchase price of standards. For details of these and other benefits contact Membership Administration. Tel:02089967002. Fax:02089967001. Copyright Copyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publications o

    36、f the international standardization bodies. Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means electronic, photocopying, recording or otherwise without prior written permission fr

    37、om BSI. This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained. If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel:02089967070.


    注意事项

    本文(BS 4651-0-1987 Ammonia solution - Methods for sampling《氨溶液 第0部分 取样方法》.pdf)为本站会员(sumcourage256)主动上传,麦多课文档分享仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知麦多课文档分享(点击联系客服),我们立即给予删除!




    关于我们 - 网站声明 - 网站地图 - 资源地图 - 友情链接 - 网站客服 - 联系我们

    copyright@ 2008-2019 麦多课文库(www.mydoc123.com)网站版权所有
    备案/许可证编号:苏ICP备17064731号-1 

    收起
    展开