高等学校化学学报 ›› 1989, Vol. 10 ›› Issue (12): 1180.

• 研究论文 • 上一篇    下一篇

镓-水杨基荧光酮伏安络合吸附波的研究

陈荣礼, 张晓丽, 王丽增, 王淑仁   

  1. 山东大学化学院
  • 收稿日期:1988-04-25 出版日期:1989-12-24 发布日期:1989-12-24
  • 通讯作者: 陈荣礼

Studies on Voltammetric Adsorptive Wave of Gallium-Salicyl Fluorone Complex

Chen Rongli, Zhang Xiaoli, Wang Lizeng, Wang Shuren   

  1. College of Chemistry, Shandong University, Jinan
  • Received:1988-04-25 Online:1989-12-24 Published:1989-12-24

摘要: 在pH为3.0的0.2mol/L邻苯二甲酸氢钾-HCI和5.0×10-6mol/L水杨基荧光酮底液中,线性扫描可得灵敏的Ga-SAF络合物吸附波,峰电位为-0.93V(vsSCE).镓在7.5×10-9~3.8×10-7mol/L浓度范围内与峰高成正比关系.

关键词: 伏安法, 络合吸附波, 痕量分析,

Abstract: In a supporting solution containing 5.0× 106 mol/Lsalicyl fluorone, 0.2 mol/Lpotassium hydrogen phthalate- HCl, at pH=3.0, a sensitive adsorptive wave of gallium- salicyl fluorone complex was obtained by using linear scanning voltammetry.The peak potential is - 0.93 V(vs, SCE).The change of peak height with the concentration of gallium is linear in the range of 7.5× 10-9~3.8× 10-7 mol/L.The electrode processes of the adsorptive wave of the complex may be presented as follows: 1.Complexing reaction in the bulk solution is Ga(Ⅲ)+H4L=GaH3L2++H+ 2.GaH3L2+ diffuses to the electrode surface and is adsorbed on it GaH3L2+=GaH3Lnds2+3.When Ep(2)=-0.93 V, the ligand and the center ion of the complex are simultaneously reduced GaH3L2+=GaH3Lnds2++5e+3H+→Ga(Hg)+H4Lads

Key words: Voltammetry, Adsorptive wave of complex, Trace analysis, Gallium

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