Ramesh Attinti, Rama Mohan Kurakalva, Seshaiah Kalluru
Department of Chemistry, Sri Venkateswara University, Tirupati 517502, India.
Talanta. 2002 May 16;57(2):243-52. doi: 10.1016/s0039-9140(02)00033-4.
Preconcentration of Cd(II), Cu(II), Mn(II), Ni(II), Pb(II) and Zn(II) in saline matrices on Amberlite XAD-4 resins coated with ammonium pyrrolidine dithiocarbamate (APDC) and piperidine dithiocarbamate (pipDTC) and subsequent determination by inductively coupled plasma atomic emission spectrometry were studied. Parameters such as effect of pH, effect of HNO(3) concentration on elution of metals from resin were studied. The results show that Amberlite XAD-4 coated with APDC was more efficient in the recovery of metal ions compared with Amberlite XAD-4 coated with pipDTC, in the concentration range of 0.1-200 mug l(-1), for 1 g of Amberlite XAD-4 coated resin. The detection limits for Cd(II), Cu(II), Mn(II), Ni(II), Pb(II), Zn(II) are 0.1, 0.4, 0.3, 0.4, 0.6, 0.5 mug l(-1), respectively, for resin coated with APDC and 0.7, 1.0, 0.8, 0.9, 1.7 and 1.2 mug l(-1) for resin coated with pipDTC. The effect of diverse ions on the determination of aforesaid metals was studied. The method was applied for the determination of trace metal ions in artificial sea water and natural water samples. The results were compared with extraction AAS method.
研究了在涂有吡咯烷二硫代氨基甲酸铵（APDC）和哌啶二硫代氨基甲酸盐（pipDTC）的Amberlite XAD - 4树脂上对盐溶液基质中的Cd(II)、Cu(II)、Mn(II)、Ni(II)、Pb(II)和Zn(II)进行预富集，随后通过电感耦合等离子体原子发射光谱法进行测定。研究了诸如pH值的影响、HNO₃浓度对金属从树脂上洗脱的影响等参数。结果表明，在0.1 - 200 μg l⁻¹浓度范围内，对于1 g涂有APDC的Amberlite XAD - 4树脂，与涂有pipDTC的Amberlite XAD - 4相比，涂有APDC的Amberlite XAD - 4在回收金属离子方面更有效。对于涂有APDC的树脂，Cd(II)、Cu(II)、Mn(II)、Ni(II)、Pb(II)、Zn(II)的检测限分别为0.1、0.4、0.3、0.4、0.6、0.5 μg l⁻¹，对于涂有pipDTC的树脂，检测限分别为0.7、1.0、0.8、0.9、1.7和1.2 μg l⁻¹。研究了多种离子对上述金属测定的影响。该方法应用于人工海水和天然水样中痕量金属离子的测定。并将结果与萃取原子吸收光谱法进行了比较。
