SANS 5797-2008 Metal release from glazed crockery (plain or decorated) and acid resistance of decoration《(普通或装饰)釉面陶器的金属溶出特性以及装饰的抗酸性》.pdf
《SANS 5797-2008 Metal release from glazed crockery (plain or decorated) and acid resistance of decoration《(普通或装饰)釉面陶器的金属溶出特性以及装饰的抗酸性》.pdf》由会员分享,可在线阅读,更多相关《SANS 5797-2008 Metal release from glazed crockery (plain or decorated) and acid resistance of decoration《(普通或装饰)釉面陶器的金属溶出特性以及装饰的抗酸性》.pdf(6页珍藏版)》请在麦多课文档分享上搜索。
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 978-0-626-20818-9 SANS 5797:2008Edition 3 SOUTH AFRICAN NATIONAL STANDARD Metal release from glazed crockery (plain or decorated), and acid resistan
4、ce of decoration Published by Standards South Africa 1 dr lategan road groenkloof private bag x191 pretoria 0001 tel: 012 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa SANS 5797:2008 Edition 3 Table of changes Change No. Date Scope Foreword This South
5、African standard was approved by National Committee StanSA TC 5140.05, Crockery, in accordance with procedures of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. This document was published in February 2008. This document supersedes SABS SM 797:1982 (first revision). SAN
6、S 5797:2008 Edition 3 1 Metal release from glazed crockery (plain or decorated), and acid resistance of decoration 1 Scope This standard specifies a method for the determination of the metal release from glazed crocery (plain or decorated) and acid resistance of decoration. 2 Reagents Use only analy
7、tical grade reagents, and distilled or demineralized water. a) Household detergent. b) Acetic acid solution, having a volume fraction of 4 % glacial acetic acid in water. c) Distilled or demineralized water. 3 Apparatus 3.1 Glass rod, of sufficient length to stir the acid solution (see 2(b) and 5.1.
8、5). 3.2 Atomic absorption spectrophometer, with the capacity to measure metals at the concentration range of mg/L. 4 Sampling Take a laboratory sample as specified in the relevant product standard. Where no standard exists, take the laboratory sample as agreed upon between the test laboratory and th
9、e manufacturer to ensure a reasonable and acceptable reliability at a reasonable and acceptable confidence level. 5 Procedure 5.1 Metal release from glazed crockery (plain or decorated) 5.1.1 Wash the test specimen throughly with a household detergent (see 2(a), rinse throughly with water, and allow
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