论文部分内容阅读
铜铁试剂(CUP)—示波计时电位法直接测定天然水和饮用水中的铝含量。在0.5 mol/L(NH_4)_2SO_4-NH_3·H_2O(pH值=5.4)缓冲溶液中,加入铝后,铝—CUP配合物切口电位为-1.20V,切口深度在7.2×10~(-7)～3.2×10~(-5)mol/LAl范围内有线性关系,检测下限为5.8×10~(-7)mol/L。在2.0×10~(-5)mol/L时相对标准偏差为5.1(n=10)。应用该法测定了天然水和饮用水中铝含量,并同ICP/AES所获结果进行了对照。结果基本一致。
Copper - Iron Reagent (CUP) - Oscillographic chronopotentiometry for the direct determination of aluminum in natural and drinking water. In the 0.5 mol / L (NH 4) 2 SO 4 -HN 3 · H 2 O (pH = 5.4) buffer solution, the aluminum-CUP complex was cut at a potential of -1.20 V and the depth of cut was 7.2 × 10 -7 ~ 3.2 × 10 ~ (-5) mol / LAl, the detection limit was 5.8 × 10 ~ (-7) mol / L. The relative standard deviation at 2.0 × 10 -5 mol / L was 5.1 (n = 10). The method was used to determine the aluminum content in natural and drinking water and compared with the results obtained by ICP / AES. The results are basically the same.