當(dāng)前位置：
首頁 >
標(biāo)準(zhǔn)詳情頁
BS 4993-1:1974現(xiàn)行
Methods of test for aluminium fluoride for industrial use. Determination of fluorine content
出版：British Standards Institution
專家解讀視頻
基本信息
標(biāo)準(zhǔn)編號： BS 4993-1:1974
發(fā)布時間：1974/2/28 0:00:00
標(biāo)準(zhǔn)類別：Standard
出版單位：British Standards Institution
標(biāo)準(zhǔn)頁數(shù)：10
標(biāo)準(zhǔn)簡介
Fusion of a test portion with sodium carbonate and separation of the fluorine by distillation with sulphuric acid. Titration of the distillate with thorium nitrate solution using either sodium alizarinsulphonate with or without methylene blue as masking agents, or methylthymol blue as indicator.
標(biāo)準(zhǔn)備注
? British Standards Institution 2013
