稀土硅鎂合金中稀土總量的測定——偶氮胂Ⅲ分光光度法

留言板

尊敬的讀者、作者、審稿人, 關于本刊的投稿、審稿、編輯和出版的任何問題, 您可以本頁添加留言。我們將盡快給您答復。謝謝您的支持!

姓名

郵箱

手機號碼

標題

留言內容

驗證碼

Spectrophotometric Determination of Total Amount of Rare Earth Elements in the Ferroalloy of Containing Rare Earth Silicon and Magnesium with Arsenazo-Ⅲ

摘要: 在水-乙醇介質中,稀土與偶氮胂Ⅲ在pH為1.2~2.1的酸度范圍內可形成1:2的紫紅色絡合物,摩爾吸光系數高達8.2×10⁴l·mol·cm^-1,含稀土總量為0~50μg/25ml范圍內服從比爾定律。鐵的干擾采用EDTA掩蔽,避免了復雜的分離手續。該方法具有較高的靈敏度,選擇性、重現性良好,用于稀土硅鎂合金中稀土總量的測定,分析結果滿意,已用于生產。
- 稀土元素 /
- 偶氮胂Ⅲ /
- 分光
Abstract: A rapid sensitive and selective spectrophotometric method for the determination of total amount of the rare earth elements in the ferroalloy of containing rare earth silicon and magnesium has been developed. A purplish red complex which has ratio of RE to Arsenazo-Ⅲ to be 1:2 can be formed in the range of pH 1.2~2.1 in the ethanol aqueous solution (λ_max=648nm,λ₆₄₈=8.2×10⁴ mol^-1cm^-1). Beer's law is obeyed in the concentration range of 0 to 50μg/25ml.The interference of Fe(Ⅲ) can be covered with EDTA.
- rare earth /
- arsenazo-Ⅲ /
- spectrophotometry