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本文报导了在0.3mol/L的HAc—NaAc(pH4.3),苯邻三酚红(PR)4.0×10~(-6)mol/L及十二烷基磺酸钠(SDS)1.0×10~(-6)mol/L的底液中,镓—PR形成—稳定的配合物,还原峰电位-0.89V(对SCE)。预富集60秒镓浓度在1.0×10~(-9)～4.0×10~(-7)mol/L范围内与配合物导数峰高成良好的线性关系。富集90秒检测下限为8.0×10~(-10)mol/L。讨论了其他痕量金属和表面活性剂的干扰,并确定镓与邻苯三酚红络合比为1∶1,可用于铝合金中镓的测定。
In this paper, we report the best conditions for the determination of HAc-NaAc (pH 4.3), phenol 4.0 × 10 -6 mol / L and sodium dodecyl sulfate 1.0 × 0.3 mol / In the 10 -6 mol / L solution, the gallium-PR complex formed a stable complex with a reduction potential of -0.89 V (vs. SCE). The concentration of gallium in the preconcentration of 60 seconds was in a good linear relationship with the derivative peak height in the range of 1.0 × 10 -9 ~ 4.0 × 10 -7 mol / L. The detection limit of enrichment for 90 seconds is 8.0 × 10 ~ (-10) mol / L. The interference of other trace metals and surfactants was discussed. The complexing ratio of gallium to pyrogallol red was determined to be 1: 1, which could be used for the determination of gallium in aluminum alloy.