This International Standard specifies a volumetric method for the determination of silver in silver jewel-lery alloys, preferably within the range of fineness stated in ISO 9202. These alloys may contain copper, zinc, cadmium and palladium. Apart from palladium, which must be pre-cipitated before commencing titration, these el-ements do not interfere with this method of determination. NOTE 1 This method is intended to be used as the ref-eree method for the determination of fineness in the alloys covered by ISO 9202.
DS/EN 31427-1994由丹麥標準化協會 DK-DS 發布于 1994-07-11,并于 1994-07-11 實施。
DS/EN 31427-1994在國際標準分類中歸屬于: 39.060 珠寶。
非常抱歉,我們暫時無法提供預覽,您可以試試: 免費下載 DS/EN 31427-1994 前三頁,或者稍后再訪問。
點擊下載后,生成下載文件時間比較長,請耐心等待......
Copyright ?2007-2022 ANTPEDIA, All Rights Reserved
京ICP備07018254號 京公網安備1101085018 電信與信息服務業務經營許可證:京ICP證110310號