采用ICP-AES测定镉、铅、铜与锌过程中相互干扰关系研究

Studies on the Interferences of Cd,Pb,Cu and Zn with ICP-AES

配制不同浓度镉、铅、铜与锌的混合溶液,而后应用电感耦合等离子体原子发射光谱法(ICP-AES)对这4种元素进行测定,以研究应用ICP-AES测定镉、铅、铜与锌时,镉、铅、铜与锌之间的干扰关系。结果表明:镉、铅、铜与锌在一定的浓度范围内均存在一定的干扰。当被测元素镉、铅、铜的浓度为0.01 mg/L时,干扰元素锌对这3种元素的干扰均较大;当被测元素铅的浓度为1 mg/L时,锌对铅的干扰较大,对镉、铜这一浓度的干扰较小;当被测元素镉、铅、铜的浓度为10和100 mg/L时,锌对这3种元素干扰较小。当锌的浓度为0.01,1 mg/L时,镉、铅、铜3种元素对锌的干扰最大,影响顺序为:镉>铅>铜;当被测元素锌浓度为10和100 mg/L时,镉、铅、铜对锌测定影响较小。

To study the interferences of Cd, Pb, Cu and Zn with method of ICP-AES, different concentration of Cd,Pb,Cu and Zn of mix solution were confected and evaluated by ICP-AES. Results showed that certain concentration of Cd, Pb, Cu and Zn has the interferences. When the density of Cd,Pb,Cu is 0.01mg/L,Zn has a bigger interference effect to these three kind of element＇s determination influence. When the density of Pb is 1mg/L, Zn has a bigger interference effect to the Pb determination influence,to Cd,Cu this density＇s determination influence is small. When the density of Cd,Pb,Cu is 10 and 100mg/L,Zn has a smaller interference effect to these three kind of element determination influence. When the density of Zn is 0.01 and 1mg/L, the Cd, Pb,Cu three kind of elements have a greatest interference effect to the Zn determination influence. The affect the order are. Cd 〉 Pb 〉Cu. When the density of Zn is 10 and 100mg/L,Cd,Pb,the interference effect of Cu are smaller than the Zn determination influence.