ImageVerifierCode 换一换
格式:PDF , 页数:8 ,大小:151.60KB ,
资源ID:1031640      下载积分:10000 积分
快捷下载
登录下载
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)。
如填写123,账号就是123,密码也是123。
特别说明:
请自助下载,系统不会自动发送文件的哦; 如果您已付费,想二次下载,请登录后访问:我的下载记录
支付方式: 支付宝扫码支付 微信扫码支付   
注意:如需开发票,请勿充值!
验证码:   换一换

加入VIP,免费下载
 

温馨提示:由于个人手机设置不同,如果发现不能下载,请复制以下地址【http://www.mydoc123.com/d-1031640.html】到电脑端继续下载(重复下载不扣费)。

已注册用户请登录:
账号:
密码:
验证码:   换一换
  忘记密码?
三方登录: 微信登录  

下载须知

1: 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。
2: 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。
3: 文件的所有权益归上传用户所有。
4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
5. 本站仅提供交流平台,并不能对任何下载内容负责。
6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。

版权提示 | 免责声明

本文(SANS 6169-2010 Water - Aluminium content《水 铝含量》.pdf)为本站会员(李朗)主动上传,麦多课文库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库(发送邮件至master@mydoc123.com或直接QQ联系客服),我们立即给予删除!

SANS 6169-2010 Water - Aluminium content《水 铝含量》.pdf

1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA

2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any

3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-24444-6 SANS 6169:2010Edition 1.2SOUTH AFRICAN NATIONAL STANDARD Water Aluminium content Published by SABS Standards Division 1 Dr Lategan

4、 Road Groenkloof Private Bag X191 Pretoria 0001Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 6169:2010 Edition 1.2 Table of changes Change No. Date Scope Amdt 1 2005 Amended to change the designation of SABS standards to SANS standards and to update referenced standards. Amdt 2

5、2010 Amended to update referenced standards. Foreword This South African standard was approved by National Committee SABS SC 147A, Water Water sampling and analysis, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This document was p

6、ublished in April 2010. This document supersedes SANS 6169:2005 (edition 1.1). A vertical line in the margin shows where the text has been technically modified by amendment No. 2. SANS 6169:2010 Edition 1.2 1 Water Aluminium content 1 Scope and field of application This standard specifies a method o

7、f determining the aluminium content of water and wastewater, using a nitrous oxide-acetylene flame and direct flame atomic absorption. The method is applicable to the determination of aluminium in the concentration range 0,1 mg/L to 100 mg/L. 2 Normative references The following referenced documents

8、 are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. Information on currently valid national and international standards can be obtained

9、 from the SABS Standards Division. Amdt 1 SANS 111/ISO 835, Laboratory glassware Graduated pipettes. Amdt 1; amdt 2 SANS 112/ISO 648, Laboratory glassware Single volume pipettes. Amdt 1 SANS 115/ISO 385, Laboratory glassware Burettes. Amdt 1; amdt 2 SANS 128/ISO 1042, Laboratory glassware One-mark v

10、olumetric flasks. Amdt 1 SANS 3696/ISO 3696, Water for analytical laboratory use Specification and test methods. SANS 6168, Water Pretreatment for metal analysis. 3 Principle The pretreated sample is aspirated into a nitrous oxide-acetylene flame, using potassium as an ionization suppressor. The abs

11、orbance measured at 309,3 nm is compared with the absorbance of aluminium standards measured under the same conditions. 4 Reagents NOTE Unless otherwise specified, only use water that complies with the requirements of SANS 3696 and reagents of analytical reagent grade. 4.1 Nitric acid (HNO3) Concent

12、rated (d at 25 /25 C = 1,42). SANS 6169:2010 Edition 1.2 2 4.2 Acidified water Containing 1,5 mL of HNO3(see 4.1) per litre. 4.3 Aluminium stock solution (1 000 mg/L) 4.3.1 Obtain a commercially available stock solution of aluminium (1 000 mg/L) of guaranteed quality, or prepare the stock solution a

13、s described in 4.3.2. 4.3.2 Dissolve 17,584 g of aluminium potassium sulfate (AlK(SO4)212H2O), previously dried in a desiccator for 24 h, in 200 mL of water. Add 1,5 mL of HNO3(see 4.1) and dilute with water to 1 000 mL in a volumetric flask. 4.4 Aluminium working stock solution (100 mg/L) Pipette 1

14、0,0 mL of the stock solution (see 4.3) into a 100 mL volumetric flask and dilute to the mark with acidified water (see 4.2). 4.5 Aluminium standard solutions (0,1 mg/L to 100 mg/L) 4.5.1 Prepare at least three aluminium standard solutions that will bracket the expected concentration of the sample by

15、 dilution of the working stock solution (see 4.4), using the acidified water (see 4.2) as the diluent. 4.5.2 Add 2,0 mL of the KCl solution (see 4.6) to 100 mL of each of the standards. 4.6 Potassium chloride (KCl) solution (250 g/L) Dissolve 250 g of KCl in water and dilute to 1 000 mL in a volumet

16、ric flask. 5 Apparatus 5.1 Atomic absorption spectrophotometer For use at 309,3 nm. 5.2 Nitrous oxide burner Suitable for attachment to the spectrophotometer (see 5.1). 5.3 Aluminium hollow-cathode lamp 5.4 Oxidant 5.4.1 Air, dried and filtered to support combustion before switching to nitrous oxide

17、. 5.4.2 Nitrous oxide, commercially bottled gas. 5.5 Fuel Acetylene, standard commercial grade. (Replace the cylinder when the cylinder pressure drops to 700 kPa.) SANS 6169:2010 Edition 1.2 3 CAUTION: Never allow the operating pressure of acetylene to exceed 105 kPa. 5.6 Pressure-reducing regulator

18、s For the supply of fuel and oxidant to the instrument at the appropriate levels recommended by the manufacturer. 5.7 Glassware Where applicable, only use burettes, pipettes and volumetric flasks that comply with the requirements for class A items as specified in SANS 111, SANS 112, SANS 115 and SAN

19、S 128, as relevant. Amdt 1; amdt 2 6 Sample pretreatment 6.1 Pretreat the sample, a blank (see 4.2) and at least one standard (see 4.5.1) in accordance with SANS 6168 in order to analyse for the appropriate form of metal, i.e. soluble, insoluble or total metal. NOTE For the purposes of legislation o

20、r specifications relating to this method, pretreat the sample for recovery of total aluminium, unless specifically indicated otherwise. 6.2 Add 2,0 mL of the KCl solution (see 4.6) per 100 mL of each sample, standard(s) and blank after pretreatment as in 6.1, and mix well. 7 Procedure 7.1 Instrument

21、 operation NOTE The differences between makes and models of atomic absorption spectrophotometers make it impracticable to formulate detailed operating instructions. Follow the manufacturers operating instructions for the specific instrument but, in general, proceed in accordance with the instruction

22、s given in 7.1.1 to 7.1.12. 7.1.1 Turn on the instrument, install the aluminium hollow-cathode lamp (see 5.3) and apply the current recommended by the manufacturer. 7.1.2 Set the wavelength at 309,3 nm and set the slit width in accordance with the manufacturers instructions. 7.1.3 Allow the lamp to

23、stabilize for approximately 10 min and then align it to obtain optimum transmission. 7.1.4 Adjust the fine control of the wavelength setting of the monochromator in order to ensure maximum response. 7.1.5 Install the nitrous oxide burner (see 5.2). 7.1.6 Check and, if necessary, adjust the gas flow

24、rates to ensure that they are at the levels specified for the instrument. 7.1.7 Turn on the air supply and then the acetylene flow, and ignite the mixture. 7.1.8 Increase the acetylene flow rate to give an acetylene-rich (white) flame. SANS 6169:2010 Edition 1.2 4 7.1.9 With a rapid motion, switch f

25、rom air to nitrous oxide and so increase the flow rate of the acetylene that the flame has a red core, of height approximately 20 mm. 7.1.10 Aspirate the acidified water (see 4.2) and, if necessary, check that the aspiration rate is in the range 3 mL/min to 5 mL/min and then zero the instrument in t

26、he absorbance mode. 7.1.11 Aspirate a standard that will give an absorbance exceeding 0,2, and optimize the burner position until the maximum absorbance value is recorded. The instrument is now ready for calibration and analysis. 7.1.12 After analysis, extinguish the flame by rapidly switching from

27、nitrous oxide to air. Allow the flame to stabilize and then turn off the acetylene. When the flame is extinguished, turn off the air supply. 7.2 Instrument calibration 7.2.1 Aspirate the analyte blank (see 4.2) and zero the instrument. 7.2.2 Aspirate each of the standard solutions (see 4.5.2), using

28、 the acidified water (see 4.2) to flush the nebulizer between aspirations, and record their respective absorbances. 7.2.3 Construct a calibration curve, using the standard concentrations and their respective absorbances. 7.3 Sample analysis 7.3.1 Aspirate the pretreated blank, standard(s) and sample

29、 (see 6.2), using the acidified water (see 4.2) to flush the nebulizer between aspirations. 7.3.2 Record the absorbances and determine the concentrations by referring to the calibration curve as constructed in 7.2.3, or record the concentrations directly if an instrument with concentration mode is u

30、sed. 7.3.3 Correct the results for the sample and the control standard(s) by subtracting the result for the pretreated blank, if applicable, and verify the absence of interference due to the pretreatment method by confirmation of the true concentration(s) of the control standard(s). 8 Expression of

31、results So express the result as to indicate the form of metal analysed and the concentration units used, e.g. Total aluminium as Al in mg/L. SABS SABS Standards Division The objective of the SABS Standards Division is to develop, promote and maintain South African National Standards. This objective

32、 is incorporated in the Standards Act, 2008 (Act No. 8 of 2008). Amendments and Revisions South African National Standards are updated by amendment or revision. Users of South African National Standards should ensure that they possess the latest amendments or editions. The SABS continuously strives

33、to improve the quality of its products and services and would therefore be grateful if anyone finding an inaccuracy or ambiguity while using this standard would inform the secretary of the technical committee responsible, the identity of which can be found in the foreword. Tel: +27 (0) 12 428 6666 F

34、ax: +27 (0) 12 428 6928 The SABS offers an individual notification service, which ensures that subscribers automatically receive notification regarding amendments and revisions to South African National Standards. Tel: +27 (0) 12 428 6883 Fax: +27 (0) 12 428 6928 E-mail: salessabs.co.za Buying Stand

35、ards Contact the Sales Office for South African and international standards, which are available in both electronic and hardcopy format. Tel: +27 (0) 12 428 6883 Fax: +27 (0) 12 428 6928 E-mail: salessabs.co.za South African National Standards are also available online from the SABS website http:/ww

36、w.sabs.co.za Information on Standards The Standards Information Centre provides a wide range of standards-related information on both national and international standards, and is the official WTO/TBT enquiry point for South Africa. The Centre also offers an individual updating service called INFOPLU

37、S, which ensures that subscribers automatically receive notification regarding amendments to, and revisions of, international standards. Tel: +27 (0) 12 428 6666 Fax: +27 (0) 12 428 6928 E-mail: infosabs.co.za Copyright The copyright in a South African National Standard or any other publication publ

38、ished by the SABS Standards Division vests in the SABS. Unless exemption has been granted, no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means without prior written permission from the SABS Standards Division. This does not preclude the free use, in

39、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 purpose other than implementation, prior written permission must be obtained. Details and advice can be obtained from the Senior Manager. Tel: +27 (0) 12 428 6666 Fax: +27 (0) 12 428 6928 E-mail: infosabs.co.za

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