摘要
在pH为3.0的0.2 mol/L邻苯二甲酸氢钾-HCI和5.0×10^(-6)mol/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(vs SCE).镓在7.5×10^(-9)～3.8×10^(-7)mol/L浓度范围内与峰高成正比关系.
In a supporting solution containing 5. 0× 10 6 mol/L salicyl fluorone, 0. 2 mol/L potassium 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 is2.GaH3L2+ diffuses to the electrode surface and is adsorbed on it3. When Ep( 2) = - 0. 93 V, the ligand and the center ion of the complex are simultaneously reduced
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1989年第12期1180-1184,共5页
Chemical Journal of Chinese Universities
关键词
镓
痕量分析
伏安法
络合吸附法
Voltammetry, Adsorptive wave of complex, Trace analysis, Gallium
