...One of the dry preliminary tests used in qualitative analysis. It is also called a bead reaction. It uses the fact that metal oxides or salts dissolve and color the glass-like beads that are formed by igniting borax Na 2 B 4 O 7 ・10H 2 O or phosphate salt (sodium ammonium hydrogen phosphate) NaNH 4 HPO 4 ・4H 2 O. The bead test uses borax as the bead, and the phosphate bead test uses phosphate salt. *Some of the terminology that refers to "bead reaction" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…定性分析に利用される乾式法予備試験の一つ。溶球反応bead reactionともいう。ホウ砂Na2B4O7・10H2Oまたはリン塩(リン酸水素アンモニウムナトリウム)NaNH4HPO4・4H2Oを強熱してできるガラス状の溶球に金属酸化物または塩類が溶けて着色することを利用するもので,溶球にホウ砂を用いるものをホウ砂球試験borax bead test,リン塩を用いるものをリン塩球試験phosphate bead testという。… ※「bead reaction」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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