Phase-selective anodic stripping analysis for trace concentrations of gallium

Electrochemistry of Gallium

“…16,46) Good results of ASV were achieved in solutions containing thiocyanate or salicylate. 7,16,46,92) The determination of gallium traces was carried out on the hanging drop mercury electrode in solutions of low ionic strength and in absence of complexing agents by Udisti and Piccardi.…”

“…The working concentration range of the electrode was 1.45 × 10 −6 to 0.1 M. Abbaspour et al 111) demonstrated the multi-walled carbon nanotube (MWCNT) composite coated platinum electrode for the electrochemical detection of gallium ion. In order to increase the sensitibity they applied the MWCNT composite poly(vinylchloride) coated platinum electrode with 7-(2-hydroxy-5-methoxybenzyl)-5,6,7,8,9,10-hexahydro-2H benzo [b] [1,4,7,10,13] dioxa triaza cyclopentadecine-3,11(4H,12H)-dione as an ionophore and dibutyl sebacate as a placiticizing solvent mediator. The sensor showed linear response in wide range concentrations of 7.9 × 10 −7 to 3.2 × 10 −2 M. The detection limit of this electrode was 5.2 × 10 −7 M of Ga(NO 3 ) 3 .…”

Development of anodic stripping voltammetry for determination of gallium in U–Ga alloy

“…Zinc has been recognized as a potential interferent in thiocyanate-based electrolytes [17] and hinders the gallium stripping signal because zinc's redox potentials are close to gallium's redox potentials [18], due to which it also gets deposited and stripped along with gallium. Zinc remains present in supporting electrolyte and desired samples as an impurity, so it was very necessary to study its affect on determination of gallium.…”

“…The most widely used techniques for the determination of gallium are atomic absorption spectrometry [1][2][3], neutron activation analysis [4][5][6][7] and atomic emission spectrometry [8]. The utility of neutron activation methods, is restricted by instrumentation cost, long exposure times or matrix interference [1,9]. With spectrometry techniques, such as atomic or molecular absorption or fluorescence, detection limits are substantially higher [1].…”

Study on simultaneous measurements of trace gallium(III) and germanium(IV) by adsorptive stripping voltammetry using mercury film electrode

“…The conventional anodic stripping determination of gallium is based on the formation of its amalgam. The best results were achieved in solutions containing thiocyanate or salicylic acid [14][15][16][17]. However, because of the negative peak potential of gallium, its stripping response is masked by the hydrogen evolution current when acidic solutions are used.…”