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 978-0-626-21209-4 SANS 5981:2008Edition 3SOUTH AFRICAN NATIONAL STANDARD Wax polishes Non-volatile matter content and the ash content of non-volatil
4、e matter 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 5981:2008 Edition 3 Table of changes Change No. Date Scope Foreword This South African
5、standard was approved by National Committee StanSA SC 5140.01A, Detergents, polishes and other chemicals Polishes, in accordance with procedures of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. This document was published in April 2008. This document supersedes SABS SM
6、 981:1993 (first revision). SANS 5981:2008 Edition 3 1 Wax polishes Non-volatile matter content and the ash content of non-volatile matter 1 Scope This standard specifies a method for the determination of the non-volatile matter content and the ash content of the non-volatile matter of wax polishes.
7、 2 Apparatus 2.1 Silica or porcelain evaporating dish. 2.2 Oven, maintained at 110 C 10 C. 2.3 Furnace, maintained at 900 C 10 C. 2.4 Dessicator. 2.5 Water-bath. 2.6 Scale or weighing balance. 3 Procedure 3.1 Heat the evaporating dish in the furnace (2.3) for 15 min. NOTE If only non-volatile matter
8、 is required, heating to 110 C in the oven will be sufficient. 3.2 Cool the desiccator and weigh it to the nearest 10 mg (m1). 3.3 Weigh (see 2.6), to an accuracy of 10 mg, approximately 4 g of the polish into the evaporating dish. Record the mass of the dish and the polish (m2). 3.4 Heat the evapor
9、ating dish on a boiling water-bath (see 2.5) until most of the volatile matter has evaporated. 3.5 Place the evaporating dish in the oven at 110 C 2 C for 16 h. SANS 5981:2008 Edition 3 2 3.6 Remove the dish, cool it in the desiccator (see 2.4) and then weigh it. 3.7 Reheat the dish in the oven for
10、2 h periods (weighing it between each 2 h period as in 3.6) until the last two weighings do not differ by more than 5 mg (m3). 3.8 Reserve the dish for the determination of the ash content (see 3.9). 3.9 Slowly char the non-volatile matter (reserved in terms of 3.8) over a small flame and then place
11、 the dish in the furnace for 15 min. 3.10 Remove the dish, cool it in the desiccator then weigh it. 3.11 Repeat the heating and cooling until the last two masses do not differ by more than 5 mg (m4). 4 Calculation 4.1 Calculate the percentage by mass of the non-volatile matter content (NV) of the po
12、lish as follows: NV = 1001213mmmmwhere m3is the mass of non-volatile matter and the evaporating dish, in grams (see 3.6); m1is the mass of the evaporating dish, in grams (see 3.2); m2is the mass of the evaporating dish and polish in grams (see 3.3). 4.2 Calculate the percentage by mass of the ash co
13、ntent (A) of non-volatile matter of the polish as follows: A = 1001314mmmmwhere m1is the mass of the evaporating dish, in grams (see 3.2); m3is the mass of the evaporating dish and the non-volatile matter, in grams (see 3.6); m4is the mass of the evaporating dish and ash, in grams (see 3.10). Standards South Africa
