…It is also called a bead reaction. It utilizes 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. First, a platinum wire with a tip wound into a ring shape with a diameter of about 3 mm is ignited with a burner, and borax or phosphate salt powder is attached to it and heated again. … *Some of the terminology that refers to "phosphate bead test" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…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。まず,先端を直径3mm程度の環状に巻いた白金線をバーナーで強熱し,これにホウ砂またはリン塩の粉末を付着させて再び熱する。… ※「phosphate bead test」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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