摘要
在（ｐＨ３．８０的０．４４ｍｏｌ／ＬＨＡＣ－０．０８ｍｏｌ／ＬＮａＡＣ缓冲浴液中，铬蓝黑Ｂ在－０．３９Ｖ（ｖｓ．ＳＣＥ）处有一还原波Ｐ１，当加入Ｇａ（Ⅲ），峰电位移至－０．４０Ｖ（ｖｓ．ＳＣＥ），峰电流显著增加．在０．２－５μｇ／２５ｍｌ范围内，峰电流与Ｇａ（Ⅲ）浓度成正比．检出限为４ｎｇ／ｍｌ．本文对电极反应机理行研究，证明该极谱波属络合物吸附波．方法已用于测定铝箔、矿石中微量镓，结果满意．
In the buffer solution of acetic-sodium acetate(pH 3. 80),the reductive wave(P1) of eriochrom blue blank B(EBBB) was abserred at-0. 39V(vs. SCE) and in the presence of Gallium (Ⅲ) the peak potential of the derivative wave(P1) was moved to-0. 40 V(vs. SCE). the peak height of P1 increases remarkably. The peak height of P1 was directly proportional to the concentration Ga(Ⅲ) in the rang of 0. 2 to 5. 0 μg /25ml. The detection limit was 4ng/ml for Gallium.The mechanism of electode reaction has been studied and discussed. The wave was confirmed to be an adsorptive complex wave. The method has been applied to the determination of trace Galliun in ores and aluminium foil after priorseparation.
出处
《广东工业大学学报》
CAS
1994年第3期75-79,共5页
Journal of Guangdong University of Technology
关键词
镓
铬蓝黑B
络合物吸附波
Gallium
eriochrome blue black B(EBBB)
adsorptive complex wave
